Can mosquitoes carry coronavirus?

Updated on: June 26, 2026

Quick overview

• The good news is that mosquitoes cannot spread COVID-19 
• That’s because the virus can't replicate inside a mosquito's body
• They can, however, spread West Nile virus, Eastern equine encephalitis, and canine heartworm
• Removing standing water and covering exposed skin are two of the most effective ways to reduce your risk.

Coronavirus (COVID-19) is on everyone’s mind, prompting many questions. With warm weather around the corner, one of those questions might be, “Can mosquitoes spread coronavirus to humans?” making the topic of mosquito pest control more important than ever.

For a mosquito to infect humans, the virus must be able to replicate in the mosquito’s gut and salivary glands, but it can’t. The Centers for Disease Control and Prevention (CDC), World Health Organization (WHO), and the American Mosquito Control Association (AMCA) all agree that mosquitoes are not a vector of COVID-19, simply because if a mosquito can’t become infected, it can’t spread it to its host.

COVID-19 is primarily spread through airborne droplets from coughs or sneezes, or by touching contaminated surfaces. For COVID-19 education from the CDC, click here.

Mosquitoes still threaten your family

Although mosquitoes cannot spread coronavirus, they can spread a number of other harmful diseases. And unfortunately, mosquitoes don’t practice social distancing, so you and your family members (including your four-legged ones) are still at risk of being infected by a mosquito bite.

Here are three primary disease concerns associated with mosquitoes:

West Nile Virus

Humans are primarily infected with West Nile Virus (WNV) by mosquitoes, but it can also be transmitted through blood transfusions, organ donations, and breastfeeding. The CDC reported cases in nearly all 50 states in 2019.

Many people report mild flu-like symptoms after contracting WNV. Recovery generally takes two weeks, but a small percentage of patients develop life-threatening complications, mainly in the elderly and those with weakened immune systems.

Eastern equine encephalitis

Eastern equine encephalitis (EEE) is a virus that can lead to a rare but serious brain infection, often resulting in permanent damage to the central nervous system. The CDC reports that EEE kills 30 percent of its human hosts, so preventing bites is crucial.

In 2019, the US saw a significant spike in EEE – 38 confirmed cases in 10 states, 15 of which resulted in death. Learn more about symptoms of EEE from the CDC here.

Canine heartworm

While mosquitoes favor human hosts, they have been known to feed on other warm-blooded mammals, like our furry companions. 

Canine heartworm is a serious parasitic disease transmitted to dogs by infected mosquitoes. During a blood meal, the mosquito introduces heartworm through the bite wound. Over time, tiny worms multiply and wreak havoc on the heart, lungs, and arteries, while absorbing the host’s nutrients. If left untreated, the damage can be permanent or even fatal. 

Fortunately, canine heartworm is preventable. Call your veterinarian to ensure your four-legged family member is up to date on medications and vaccines.

Ways to fight the bite

There are several ways you can reduce mosquito activity around your home. Here’s what you can do to protect yourself and your family as warm weather sets in:

Protecting your home: Avoid standing water, such as kiddie pools and covers, flower pots, trashcans, and birdbaths. Mosquitoes can breed with as little as a teaspoon of water.  Also, ensure all open windows and doors have secure, tear-free screens. 

Protecting your skin: When possible, cover all extremities with light-colored, long-sleeved shirts and pants while outside and always wear an EPA-approved insect repellent. Mosquitoes are also attracted to perfumes, so avoid fragrant hairspray, cologne, and sunscreen.

Ehrlich is dedicated to keeping families safe from pests. For information about a preventive application for your lawn, call a mosquito control expert at 888-984-0186.