How to tell when your COVID-19 is the most contagious; study shows 2 days before and 3 days after symptoms appear

A new study released found that a person is the most likely to spread the virus two days before their symptoms appear and three days after.

The study looked at 9,000 people who were in close contact with people who had COVID-19.

The study from Boston University focused on a population in Zhejiang province of China between January and August of 2020.




Evidence showed the close contacts of infected individuals were also infected either shortly before or after the first person showed symptoms.

The study also revealed that if an asymptomatic person came down with COVID, it was likely they got it from another asymptomatic person.


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