The CDC guidelines for COVID-19 include recommendations for isolation, quarantine, and prevention actions. Here are some key points from the search results:

• Isolation: If you test positive for COVID-19, stay home for at least 5 days and isolate from others in your home. You are likely most infectious during these first 5 days. Regardless of vaccination status, you should isolate from others when you have COVID-19. You should also isolate if you are sick and suspect that you have COVID-19 but do not yet have test results. If your results are positive, follow the full isolation recommendations.

• Quarantine: If you were exposed to the virus that causes COVID-19, regardless of your vaccination status or if you have had a previous infection, you should wear a mask as soon as you find out you were exposed and start counting from Day 1. Day 0 is the day of your last exposure to someone with COVID-19. Day 1 is the first full day after your last exposure. Take extra precautions if you will be around people who are more likely to get very sick from COVID-19. CDC now recommends quarantine for 5 days followed by strict mask use for an additional 5 days for people who are unvaccinated or are more than six months out from their second mRNA dose (or more than 2 months after the J&J vaccine) and not yet boosted.

• Prevention: CDC recommends universal indoor masking for all teachers, staff, students, and visitors to K-12 schools, regardless of vaccination status. CDC also recommends some prevention actions at all COVID-19 hospital admission levels, which include basic health and hygiene practices like handwashing. If you have COVID-19, you can spread it to others, even if you do not have symptoms. If you have symptoms, get tested and stay home until you have your results. If you have tested positive (even without symptoms), follow CDC’s isolation recommendations. These recommendations include staying home and away from others for at least 5 days (possibly more, depending on how the virus affects you) and wearing a high-quality mask when indoors around others for a period of time.

Its important to note that these guidelines are subject to change as new information becomes available.