How to Avoid COVID while Voting
KN95 masks, which block 95 percent of particles larger than 0.3 micron, on Election Day.*

In June the U.S. Centers for Disease Control and Prevention issued guidelines to help prevent the spread of COVID-19 at polling places. The recommendations advise poll workers and voters to adopt many of the same measures public health experts have encouraged in other settings: wearing masks, maintaining social distancing, and disinfecting surfaces and voting equipment. And people who feel unwell or have recently been exposed to someone with the virus should stay home.

“It’s incumbent upon all election officials at every level to advocate for the recommendations by the CDC for social distancing and mask wearing,” says C. Perry Brown, an epidemiologist at Florida A&M University’s Institute of Public Health. “The only way to cut down on transmission is to adhere to the recommendations.” Brown says he thinks officials should even go so far as to mandate wearing a mask in public. (Some states already have such mandates, but others do not.) Brown recommends that voters look for a voting booth that is next to an empty one and bring disinfecting wipes to quickly clean the booth before touching anything in it.

Voters should also pay attention to whether their polling place is following proper infection control protocols—and speak up if it is not—says Lenora Campbell, dean of the College of Health and Human Sciences at North Carolina Agricultural and Technical State University. She says poll workers should have a plan for how to deal with any voters who might refuse to wear a mask. “It is everyone’s responsibility to ensure a safe voting experience,” Campbell says.

Michael Kohanski, a rhinologist at the University of Pennsylvania’s Perelman School of Medicine, recommends that voters go to the polls at times that are less likely to be crowded and take advantage of early voting options if available. “Also, plan a backup time to vote in case you are not comfortable with the wait time at a polling location,” he says. “Take the time to know all the up- and down-ballot candidates and any referendum items that are on your ballot, so you can reduce your indoor time while voting.”

The polling places themselves need to be prepared, too. In July Lidia Morawska, an aerosol scientist who directs the International Laboratory for Air Quality and Health at Queensland University of Technology in Australia, co-authored an open letter in Clinical Infectious Diseases urging public health agencies such as the World Health Organization to recognize the possibility of airborne transmission of coronavirus. That week the WHO updated its guidelines to acknowledge the risk of such transmission. The CDC made a similar update on October 5. Morawska says election officials should maximize airflow at polling places by opening windows or running ventilation systems on high and without recirculation in order to bring in fresh outside air and reduce the risk of airborne spread.

“Local building ventilation engineers should be consulted to identify the best measures,” Morawska says. “If it is not possible to provide adequate ventilation, air purifiers may be installed—and everybody should be wearing masks, particularly the [polling] staff, as they may be potentially exposed in these environments for a long time.”

President Donald Trump—who trails his opponent, former vice president Joe Biden, in national polls—has frequently distorted the facts about mail-in voting and has made unfounded claims about potential ballot fraud. Mail-in ballots are safe and secure, but Trump’s falsehoods may persuade some Americans to vote in person instead. Ben Hovland, chairman of the U.S. Election Assistance Commission, says it is important for voters to know they have options. “[Voters should] think about how they’re going to engage and know what their options are,” he says. “Every state has an option to vote by mail or absentee ballot,” although a handful of states still require an excuse, such as age or disability. People who either want or need to vote in person should go during off hours or take advantage of early voting wherever it is available.

“Election Day is the last day to vote,” Hovland says. “As we spread out the number of Americans participating over a broader election period, rather than just on Election Day, that helps reduce congestion and helps make a safer voting experience for all Americans.”

Read more about the coronavirus outbreak from Scientific American here. And read coverage from our international network of magazines here.

*Editor’s Note (10/14/20): This sentence has been edited after posting to correct the description of KN95 masks.


Jim Daley

Jim Daley is a science journalist based in Chicago. See more of his writing at