PSA: Now is your last chance to get free COVID tests from the post office

“The advantage of at-home tests is that they are fast,” Karen Edwards, PhD, a professor and chair of the department of epidemiology at the University of California, Irvine, previously told Well+Good. “You get the results immediately, in 10 to 15 minutes, for example.” They’re ideal to use right before a gathering or social event, as they can quickly tell you whether or not you’re potentially infected and contagious.