“Today, we are faced with a different challenge, a new variant called Omicron that has rapidly spread throughout the world, including a massive, unprecedented surge in the United States. This is an extraordinary virus, the likes of which we have not seen even close to in well over 100 years. It is a very wily virus. It has fooled everybody all the time, from the time it first came in, to Delta, to now Omicron — very unpredictable, and we’re doing the best we possibly can.” “I have heard from so many people who find the latest C.D.C. isolation and quarantine guidance confusing and hard to interpret. If someone is exposed to or has Covid-19 and they’re vaccinated, what do they do?” “If they are exposed to Covid-19 and they are completely boosted, they should — they do not need to stay home, but they should get a test on Day 5. If they have Covid, our guidance does not distinguish between your vaccination status. So by five days after your symptoms, if you’re feeling better, if your fever is better, if your cough and sore throat are better, then on Day 6 you can go out, but you have to wear a mask.”