Social distancing worked its way into the common vocabulary with the arrival of the highly contagious coronavirus, and with it the admonition for people to stay at least 6 feet away from others.
That can be nearly impossible in a vehicle.
The virus can be spread by droplets resulting from coughing or sneezing, or by aerosols released while talking or simply breathing. Outdoors, wind can dilute the viral particles. In an enclosed vehicle they have nowhere to go.
The Drive reader Mary wondered if she should be worried about catching or spreading the coronavirus when driving with family members or friends in her car, even if everybody feels fine.
"If the person is in their own car with their household contacts — and haven't loaned the car to anyone else to drive — driving together is not a problem," said Kris Ehresmann, infectious disease director at the Minnesota Department of Health. "That's no different from being at home with family members."
The Centers for Disease Control and Prevention agrees, but recommends limiting the number of people in a vehicle, even when they are from the same family or household. The agency suggests having only one or two family members who are not high risks to contract the illness in the vehicle at the same time, in addition to the driver.
People from different households should not ride in the same car, Ehresmann said, a sentiment echoed by the CDC. But if they must, there are ways to minimize the risk of getting or transmitting COVID-19.
Three researchers from Harvard's T.H. Chan School of Public Health say that opening the windows, even just a crack, can help dilute the concentration of droplets and aerosols in a car. That brings fresh air into the vehicle.