antigen test

How long does immunity last after an infection? Are rapid tests always accurate? How often is a booster in order? In this installment of our FAQ series, we look into questions about "COVID time."

Nobody wants to infect their friends and friendly, but do you really have to keep isolating at day 12, 13 or beyond? Unfortunately — and perhaps unsurprisingly — the science is not entirely settled.

With COVID case counts falling and rising, testing is critical. But how many days after exposure should I test? And if I have symptoms but test negative, might the test not be accurate?