How long are you contagious if you test positive for COVID-19?
Pepijn Rademaker
2025-11-26 20:28:31
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Generally, your contagious period ends after nine days if symptoms improve.
The CDC advises that you isolate at home and away from others until your symptoms improve and you do not have a fever for at least 24 hours.
People with more severe symptoms will take longer to recover and will need to isolate longer to prevent transmission to others.
One study found that people with a weak immune system, such as from chemotherapy or HIV, can spread the virus for four weeks.
Keep in mind that you are likely contagious if you still test positive after this time.
Continue to isolate at home and wear a high-quality mask until you test negative.