The CDC suggests COVID-19 immunity lasts for three months
Antibody testing suggests that protection from COVID-19 quickly wanes. (Pexels/)Follow all of PopSci’s COVID-19 coverage here, including tips on cleaning groceries, ideas for hosting a virtual party, and the argument against using valved masks.On Friday the Centers for Disease Control and Prevention (CDC) updated its guidelines for quarantining to prevent the spread of COVID-19. Most notably, the agency now excludes “people who have had COVID-19 within the past 3 months” from the need to self-isolate after coming into contact with individuals infected with the virus. This guidance does not apply to people who have recovered and then develop symptoms again; the CDC still recommends they get tested to rule out an ongoing or repeat infection.When you get a cold, the flu, or another virus, cells within your adaptive immune system design antibodies to find and kill it. Antibodies remain in your body once the virus is gone, and they recognize...