“This is the hardest thing of all, because it’s not just the risks and benefits to you,” said Dr. Robert Wachter, a professor and the chair of the medicine department at the University of California, San Francisco. “It’s the risks and benefits to the people around you.”

One good way to frame the issue is to ask: Who is the most vulnerable person in your immediate circle?

If you have compromised immunity, for example, or live with someone who does, it’s a good idea to continue to wear a mask and maintain social distance around strangers, especially in indoor areas with standing air where the virus may collect. Masks are also important if you’re unvaccinated or spending time with others who are unvaccinated. Unvaccinated people are at overwhelmingly higher risk of hospitalization and death from Covid-19. Masks are also a must in hospitals, where there are many vulnerable people.