COVID-19 rebound is when people with COVID-19 get better, then begin to get symptoms 2-8 days after they have recovered. They may also test positive again. If your COVID-19 symptoms come back or get worse after you have ended isolation, you must isolate yourself from others again. You can end isolation for COVID-19 rebound 5 days after your rebound began, as long as you are fever-free for at least 24 hours and your symptoms are improving. Wear a highly protective mask around other for at least 10 days after the start of your rebound, as it may be possible to spread COVID-19 to others during rebound. Read more from the FAQ document issued by the Los Angeles County Dept. of Public Health.