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Mosquito Bite Victim
mosquitoes are definitely one of the most frustrating parts of summer. I went camping for a weekend and came back with 200 mosquitoes bites. Mosquitoes love me. Whatever it is that they're into, I've got it. Unfortunately.
Jon Flynn Hill (Host)
I want you to close your eyes and imagine a perfect summer girls night out. It's dusk. You assemble your crew and you hit up the ultimate cookout. You avoid the grill. You don't really want all that smoke in your face, but the food really starts calling your name. And what a spread. You gorge yourself on a delicious meal and then hate to dine dash. But hey, you got what you needed and you are off to the next spot. That is the perfect Saturday night for mosquito. These bloodthirsty insects are more than an annoyance that feasts on your ankles. Mosquitoes are the deadliest animal on the planet. I'm Jacqueline Hill, and this week on Explain It To Me from Vox, we're trying to swat away our mosquito problem for good. Every summer, I'm reminded just how much mosquitoes love me. They also love Sonja Swiger. She's an entomologist at Texas A and M, where she specializes in bugs that bite us.
Sonja Swiger (Entomologist)
Well, you know, I don't know why they like me so much. I know why they like people in general. One of the main reasons is because of the CO2 we put off.
Jon Flynn Hill (Host)
Ooh, what do we have here?
Sonja Swiger (Entomologist)
Your body temperature Whether or not you're a living host that they can get blood from, that's important.
Jon Flynn Hill (Host)
Okay, they're alive.
Mosquito Bite Victim
Check.
Sonja Swiger (Entomologist)
They also do like colors. They have found that they do have a preference for more flowery colors actually.
Mosquito Bite Victim
Right.
Sonja Swiger (Entomologist)
So more like the pinks and the blues and things like that.
Jon Flynn Hill (Host)
Ooh, I love butter yellow.
Sonja Swiger (Entomologist)
They have found, which is, this is a fun one, that if you consume alcohol, that actually makes you more attractive. Actually it was a study done with beer. So as folks, you know, took in some more beer at their parties, they actually became more attractive.
Jon Flynn Hill (Host)
Okay, well this one's got something going on.
Sonja Swiger (Entomologist)
They've also had some studies where the mosquitoes have become used to smells that they're associated with, such in urban areas. You know, there are certain smells that are always in that region. In the mosquitoes, which it was the 80s aegypti mosquito actually preferred people who came from that area as opposed to other people that they may be encountering. So it's kind of interesting to think that mosquitoes would have that much common sense, I guess, in a way.
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Right.
Sonja Swiger (Entomologist)
That much ability.
Jon Flynn Hill (Host)
Not that they have a preferred flavor, flavor of human being. Like, oh my gosh. So what are mosquitoes doing exactly when they bite us? Like what are the mechanics and what are they trying to get?
Sonja Swiger (Entomologist)
We refer to it as a blood meal, but it's not necessarily a meal. It's not a food source. So but it's a necessity in order for them to produce eggs. So the female's going to again sense the host that she's looking for based on her factors that she's in tune to. And once she finds the ability to probe, she will eventually then, you know, address it with her. Her proboscis is made up of different features. And then the internal part is what she actually will bite us with. So they'll actually unsheathe that and start to force the inner part of their mouth parts into our skin. In the process of doing that, they're also going to spit saliva into us. Yes. And the reasons they do that have many purposes. One is cause they don't want us to know that were getting bit. So they're gonna spit in us with the saliva. They're gonna put in some materials that also anesthetize that biting. That'll also slow the flow rate of the blood. Cause that's, you know, they're trying to drink it, they don't want it to come flying out at em like a fire hose. They need to regulate that. Unfortunately though, when they're doing that in the saliva. They're also spitting pathogens into us if they have them. Some of our larger mosquitoes are not as friendly when they bite us, they may actually hurt. They don't always choose to be polite about it. So we aware of those ones for sure.
Jon Flynn Hill (Host)
How soon after I get bitten does my skin start to swell up? Does that bump start?
Sonja Swiger (Entomologist)
Well, that depends on a person. Some people react immediately and then some people will react later. Like it could be an hour, half hour, the next day, 24 hours, or even a day or two. And then there's people who have no reaction whatsoever. So unfortunately, there's no set answer to that because everybody reacts differently. I think I'm, personally, I'm more of a like second level. I'll react usually within 30 minutes of a bite, but it's not common. I react instantly. But my mother, she's an instant reactor, right? So she, the minute she's bitten by something, she gets a welt, she gets a hive. And she can, she knows it. So it does vary and then it also changes because your amount of exposure can change your reaction as well.
Mosquito Bite Victim
I think probably in my 30s, I just stopped reacting to them. So when I get bitten now, they still bite me, but instead of getting a raised itchy bump, I just get a tiny little spot that doesn't itch at all. So I guess I've built up a tolerance to mosquito venom over the years.
Sonja Swiger (Entomologist)
Some people can get bit constantly and constantly react to it and they get more severe reactions to it. And then some people can get bit frequently and eventually not notice it will actually deplete those reactions. So again, there's no set. This is how it's going to be. It really just depends on how you as a person will react to those bites. And those bites are not exclusive across the lines for all biting insects either. So there's variability in that as well.
Jon Flynn Hill (Host)
You said mosquitoes love you, so I have to know, as an entomologist, what do you use to keep them away?
Sonja Swiger (Entomologist)
I just stick with deet because that's always worked for me. So. And generally it's easier to access too, if you do try some others. There are a few others out there. So, like, pericaritin is another good one, as long as you don't have a reaction to it. Because again, some people do react to different chemicals. It's nothing against the chemical, it's just the way our, our bodies react. There's oil, lemon, eucalyptus, which is a natural product that's been approved and tested. But the caveat with that is it's not labeled for children. So we do have to careful of that. Obviously you want something that is as good as or as close to as good as de because it has been found to technically be, I guess the gold standard. They've not really found anything much more effective than that but they can definitely get equivalent to it.
Jon Flynn Hill (Host)
I have tried all types of things. There were these, I remember one year there were like these bracelets that it was like they're going to keep mosquitoes away. And I was like, well, doesn't hurt. Or you know, citronella candles. When you're out on someone's patio, do those things do anything?
Sonja Swiger (Entomologist)
Yeah, I know bracelets were definitely not found to be as effective as they claimed. Plus they did because they did have some type of a chemical in them. If they stayed on children too long they actually could cause a chemical burn. So. Oh, you know, as a mom I was like no, no, we're not going to go that route. So I was like let's not do that. The candles are limited when you're outside
Jon Flynn Hill (Host)
and you won't bugs down.
Greg Kabnik (Bioethicist)
Now there's an off that you don't.
Sonja Swiger (Entomologist)
It depends on the size of the space and how close you sit to the candle. So the candle in the citronella does have an effect, but how far does it expand is is the question how many do you really need to do? The job you're asking it to do is kind of where you run into an issue there. So you may find better results by using something different.
Jon Flynn Hill (Host)
What do you do for post bite remedies?
Sonja Swiger (Entomologist)
I'm a just deal with it kind to be honest. So I'm a true entomologist. I don't kill much and I just deal with it.
Jon Flynn Hill (Host)
So.
Sonja Swiger (Entomologist)
But you know, there are good products nowadays that you can get for anti itch. I would suggest that, you know, you hear all these different remedies. Putting ice on it, sure. That just soothes that initial bite. Maybe that calms the skin. That's really what you're trying to do. You're trying to calm your body's reaction to the bite itself and really just trying to trick the skin into realizing it's. It's okay. Mosquitoes need to be managed. I didn't intend to be an entomologist to kill insects. That wasn't my intention. Actually my research. I didn't kill any. But because of the betterment of society sometimes we do have to interfere and we do need to play our role. There are certain individuals in those populations that are more heavily impacted and they're generally going to be the elderly or the the young. Right. And we want to protect every generation that we can.
Jon Flynn Hill (Host)
There's a real imperative to try to curb the mosquito problem. Up next, we're headed to the lab. When I got a new car, I thought my insurance premium would increase and empty my bank account. Like if fatween won the lottery. I've invested most of my winnings in chicken tenders because they're bomb. But bro, I bought a house and it's sick, bro. I'm thinking the floor is gonna be all trampoline, bro. With the helipad on the roof. The contractor said it's structurally unsound, but they're just being babies. But switching to Geico saved me hundreds. So my bank account is safe.
Greg Kabnik (Bioethicist)
It feels good to save some hard earned cash. It feels good to Geico
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Jon Flynn Hill (Host)
This is. Explain it to me. I'm J.Q. one way to protect yourself against mosquito bites is to get them at the source. Make sure they can't lay their eggs in standing water. But the life cycle of a mosquito is short, just a month max, which means they're gonna keep coming back. So researchers are trying all sorts of ways to neutralize the mosquito.
Eric Carraghetta (Mosquito Researcher)
My name's Eric Carraghetta. I'm an assistant professor of mosquito microbe interactions working out of the Florida Medical Entomology Laboratory. And that's part of the University of Florida. I mean, there's actually some incredibly beautiful mosquitoes. So if you look for photos of pretty mosquitoes, you'll see they're all different types. Some of them are iridescent, some of them have sort of plumes on their legs. And they kind of look like Dancers. But I guess my favorite is probably the Aedes aegypti, because that's the first organism I ever studied. If we take a step back and think of mosquitoes as a whole, there's more than 3,700 described mosquito species.
Jon Flynn Hill (Host)
Wow. Okay. Did not realize there were that many.
Eric Carraghetta (Mosquito Researcher)
There's so many. And there's probably a lot that have not been described by science as well. But most of those, in fact, the vast majority of those species don't actually bite people, which means they aren't responsible for spreading disease. It took centuries for us to actually figure out that certain diseases were caused by mosquitoes and then not caused by mosquitoes directly, but caused by pathogens spread by mosquitoes. Beyond that, the world is a big place. And how do you find everywhere where those target mosquito species are actually breeding and laying their eggs and developing? It's really, really complicated. The next issue is this problem of insecticide resistance. So for decades we've performed chemical management of mosquito populations, but we're now seeing that that is less effective than it used to be because mosquitoes are becoming resistant to the more commonly used chemicals.
Sonja Swiger (Entomologist)
We have been seeing some increased accounts of insecticide resistance in the West Nile vectors across the country.
Additional Expert/Commentator
They say as we spray more, the more mosquitoes are exposed to pesticides, and in turn there's more resistance to those pesticides. And with a warming climate, winters may not stop the spread.
Eric Carraghetta (Mosquito Researcher)
So we now have populations of mosquitoes all over the world that are resistant to these chemicals and sometimes multiple chemicals.
Jon Flynn Hill (Host)
Eric actually thinks it may be possible for humans and mosquitoes to live in greater harmony with a little help from genetic modification.
Eric Carraghetta (Mosquito Researcher)
Genetic control of mosquitoes is an old idea, but one that's grown in interest in the research community over the last couple of decades. We can sort of simplify it down to two categories. The first is called population replacement. And the idea there is that you pick a target mosquito population and modify its genetics to immunize it against pathogens of interest that approach the replacement. It's really still in the laboratory testing phase. The second option is called population suppression. And there the goal is the same as using chemical insecticides. We want to reduce mosquito numbers so that there's fewer of them to bite us.
Jon Flynn Hill (Host)
Google just announced its own mosquito fighting experiment. Google's health research project called Debug is asking for permission to release up to 32 million male mosquitoes in Florida and California over the next two years.
Additional Expert/Commentator
The initiative is aimed at reducing disease
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carrying mosquito populations by introducing sterile mosquitoes
Jon Flynn Hill (Host)
that can eliminate the Spread of illnesses like dengue fever and Zika. They're basically trying to sterilize mosquitoes. Right. Walk me through what's going on here.
Eric Carraghetta (Mosquito Researcher)
Sure. So to do that, we want to take a step back and introduce people to Wolbachia, the bacterium that's part of the Google strategy. So Wolbachia, it's a very common bacterial endosymbiont in insects. Google has taken Wolbachia from a donor mosquito and then using very small needles, they perform this procedure called embryonic microinjection. So they have purified Wolbachia cells, they put it in the needle, they get freshly laid mosquito eggs from the target mosquito species and they inject the Wolbachia into those eggs. The mosquitoes that are injected develop, and if they survive, they might harbor a stable Wolbachia infection. Google's Wolbachia strategy is population suppression. So again, that means they're trying to reduce the number of mosquitoes in a target population. So they release male mosquitoes and they go out into nature and they find and mate with wild female mosquitoes. And basically it's the makes Wolbachia infected insects incompatible with uninfected insects. So when these Wolbachia carrying males mate with uninfected females, none of the progeny hatches. So we say their eggs are inviable. And because Google is releasing a lot of males into the area, they saturate the area with these males. And on that scale, how it works is that basically there's fewer surviving larvae in the next generation. And if they keep releasing males over the next few weeks or two to three months, hopefully there's really large suppression effects. So we're talking removing 90 to 95% of the mosquito population in that area.
Jon Flynn Hill (Host)
Okay, that's the hope. But does this strategy actually work?
Eric Carraghetta (Mosquito Researcher)
At the moment, this suppression approach with Wolbachia is quite widely utilized in the world. So there's been some very successful examples of this type of program. Working to control other mosquito species in countries like China and Singapore, authorities are
Jon Flynn Hill (Host)
expanding Project Wolbachia to reach some 800,000 households by 2026. So our stock colony produces about 24 million eggs a week. We release about 5 million males out into the field.
Eric Carraghetta (Mosquito Researcher)
In Singapore, they've just had a study published that really demonstrates they're cutting the risk of dengue infection in the areas where they use Wolbachia based suppression to control Aedes aegypti mosquitoes.
Jon Flynn Hill (Host)
Wow. So how long will it take for Google to fix our mosquito problem over
Eric Carraghetta (Mosquito Researcher)
here in the U.S. well, at the moment, Google's not been approved to release these mosquitoes and it might take potentially years to get that approval and to roll out the technology.
Jon Flynn Hill (Host)
What would the ideal relationship between human and mosquitoes look like? You think, what's the goal?
Eric Carraghetta (Mosquito Researcher)
It's gonna vary from place to place. Like, I can't come in and tell everyone in the world to do things the Eric way. Even when it comes to mosquitoes, local community groups and stakeholders need to decide what's right for them. So it might be that they are removing specific mosquito species from around where they live, if that's possible, or it might be that they are taking a replacement approach and immunizing those mosquito populations. So we, we really want to have lots of options available to people so that we can present solutions that are right for specific segments of every community.
Jon Flynn Hill (Host)
What if the science got so good that we could actually eradicate mosquitoes altogether? Just because we could doesn't mean we should. That's next. Support for the show comes from Talkiatry. If you've ever wanted to meet with a psychiatrist, two big factors can make it difficult. Insurance and long wait lists. Talkiatry exists to make the process a lot easier. You can see a licensed psychiatrist online who takes your insurance in just a few days. Talkiatry is a 100% online psychiatry practice that provides comprehensive evaluations, diagnoses and ongoing medications. Medication management for conditions like adhd, anxiety, depression, bipolar disorder, ocd, ptsd, insomnia, and more. Unlike therapy only platforms, Talkiatry is psychiatry. That means you need a medical provider who can diagnose mental health conditions and prescribe medications when it's appropriate. They have more than 800 in network clinicians and you can meet with the same provider every time rather than constantly starting over. They'll take the time to understand what's going on, build a personalized treatment plan and support you over time. You can go to tokyotry.com explainit to complete the short assessment and get matched with an in network psychiatrist in just a few minutes. That's tochiatry.com explainit to get matched in minutes.
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Mosquito Bite Victim
I gleefully await the day that these blood sucking parasites are eradicated off the face of the Earth.
Jon Flynn Hill (Host)
I'm J.Q. back with more. Explain it to me. Getting rid of mosquitoes once and for all might solve a lot of problems for us. But is it the right thing to do? Greg Kabnik's answer surprised me. He's based at the Hastings center for Bioethics.
Greg Kabnik (Bioethicist)
Well, I was on a National Academies of Sciences committee a few years ago that was looking at a technology called gene drive that can be used to make changes in populations of wild animals, wild organisms. And we were looking at Anopheles gambia, which is a complex of species. Anopheles mosquitoes are the vector for malaria. And we just brought together a group of environmental ethicists and conservation biologists, ecologists to think about this question. Would it be okay ever to wipe out a species? We brought together folks who are kind of like me, predisposed not to want to do that, predisposed to try to protect species, leave the natural world alone. But we were persuaded that could be worth looking into it.
Jon Flynn Hill (Host)
You know, I, I have to admit, and I don't know, maybe this is bad person alert, but I would not be terribly upset if mosquitoes were gone tomorrow. I'm a person who gets bitten up so badly and then on top of that, the disease of it. Are there people who think, okay, why not just get rid of them all? Like, what is stopping that idea from taking root and happening?
Greg Kabnik (Bioethicist)
For one thing, getting rid of all of them would be phenomenally difficult. The real goal for the people who are doing this work is to address the underlying public health problem. And with malaria, the mosquito is a vector. It's part of what transmits malaria. It's part of the life cycle of Plasmodium, which is this single celled microbe that is actually what gets into your bloodstream and then causes malaria. And you can get rid of malaria by getting rid of Plasmodium. You don't have to get rid of the mosquito. Oh, and we seem to have different, I think intuitively people have slightly different views about species at sort of different levels. I haven't seen anyone lament the possible loss of Plasmodium. But there are people who think we shouldn't get rid of mosquitoes.
Jon Flynn Hill (Host)
Do we? Would it be okay just to eliminate certain species, then, you know, there are some that don't carry disease as much. Maybe it's like, okay, let's target the ones that do.
Greg Kabnik (Bioethicist)
Yeah, exactly. That's exactly right. And that's essentially where we came down in Anopheles Gambia. We thought, you know, this. This one is really pretty horrific. There are like 800 species of mosquito in Africa. Chances are you could get rid of Anopheles Gambia across sub Saharan Africa, and chances are there would be little to no environmental impact from losing it. And then there are other kinds of mosquitoes that have been spread around the world. They're not native. And so you're not necessarily changing a natural system. If you get rid of them, like the mosquitoes that are biting you at night, depending on where you're living, it's one of the culex species, probably, and those are not native. So you're not. Even if you get rid of it, you're not changing the original ordering of a natural system.
Jon Flynn Hill (Host)
I noticed that you said chances are that it would probably be fine. How do we know for sure? How do you weigh that level of uncertainty against the potential benefits to public health?
Greg Kabnik (Bioethicist)
You don't know for sure for sure. We could get to a point, probably with a given species, that we could be pretty confident that it would be fine. You couldn't be absolutely sure. And then the question is, well, do you need to know for sure? How do you feel about the level of uncertainty here? If, you know, you're faced with an emergency situation and, you know, like, you're in a burning building and you need to, like, jump to the ground, do you know for sure that you can get to the ground with. Without killing yourself, something like that? Well, you, you don't necessarily, but if the building is on fire, you'll go ahead and take the chance. Malaria is a little bit like that. If we didn't have malaria and then suddenly malaria were introduced, a disease was introduced that was killing that many people, killing 600,000 people a year, it would feel like the house was on fire. And we would do some stuff to get rid of it. We'd take some chances to get rid of it.
Jon Flynn Hill (Host)
When you get bitten up in the summer, I don't know, how do you think of it? Like, does doing this type of research and thinking about it change your relationship with all that buzzing in your ear a little bit?
Greg Kabnik (Bioethicist)
It does. In some funny way, I like to go up to the Adirondacks and go canoe camping up there. And if we go at the wrong time, There will be probably a few species of mosquitoes biting us up and there could be several species of fly biting us. And it can be really pretty tough to be up there. But I don't want, I would not want to get rid of all of the species of mosquito and biting black fly up there. It's sort of part of the whole system up and I want to leave it alone. And now that we might be developing the capacity to begin to make changes like that, that recognition, well, I would really like to come up shy of doing that. It does capture the way I feel about the natural world. Wild species are for us a kind of marker of the value of the natural world. And it feels like a particularly awful thing to do to get rid of a species. And so the argument in favor of it, if you were ever to do it, would have to be really quite strong.
Jon Flynn Hill (Host)
And that's our show, by the way. If you want to know more about what to do about bugs, our friends, friends over at the podcast Unexplainable. Have an episode all about those beautiful invasive lanternflies. We want your help with an upcoming episode all about living a long life. Longevity is a buzzword these days. We want to know what are you doing to live longer? Or is making it to 100 just not a priority for you? Give us a call at 1-800-618-8545 or send an email to askvoxox.com and consider becoming a Vox member. You get access to stuff like ad, free podcasts and exclusive newsletters. Head over to Vox.com members to learn more. This episode was produced by Ariana Aspuru. It was edited by Ginny Lawton. Fact checked by Melissa Hirsch, engineered by Patrick Boyd. Our executive producer is Miranda Kennedy and I'm your host, Jon Flynn Hill. Thank you so much for listening. I'll talk to you soon. Bye.
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Date: June 21, 2026
Host: Jon Flynn Hill (for "Explain It To Me" from Vox)
Guests: Dr. Sonja Swiger (Entomologist, Texas A&M), Dr. Eric Carraghetta (Mosquito Researcher, UF), Greg Kabnik (Bioethicist, Hastings Center)
This episode dives deep into the world of mosquitoes, exploring why they're such persistent summer pests, how they choose their victims, and what science is doing to fight back. From field-tested repellents and urban myths to innovative lab projects and big questions about eradicating entire species, Jon Flynn Hill uncovers the buzzing details of our seasonal battle with the deadliest animal on earth.
[01:17–06:54]
Factors attracting mosquitoes:
Mechanics of a mosquito bite:
Individual reactions:
[07:25–09:38]
Best repellents:
Myths debunked:
Post-bite care:
[12:32–16:36]
Controlling mosquitoes at the source:
Insecticide resistance:
Lab innovations:
Success metrics:
Regulatory hurdles:
[23:53–30:21]
Ethical debate:
Risks and unknowns:
Nuance over blanket solutions:
On why mosquitoes love you:
On the bite itself:
On long-term immunity:
On efficacy of bracelets:
On genetic suppression:
On the philosophy of eradication:
On preserving nature:
This summary provides a full arc of the episode, from the biology of mosquito bites to the moral and scientific frontiers of eradication. It's a must-listen for anyone ready to swat smarter next summer.