The CDC recommends that anyone who comes into close contact with someone who has COVID-19 should wear a high-quality mask as soon as you find out you were exposed, and for 10 full days after exposure. The CDC recommends that you get tested for COVID-19 after five days. If you test positive, isolate immediately. Even if you test negative, you should continue wearing a high-quality mask when around others at home and indoors in public through day 10. 

Updated August 12, 2022