DENDROLOGY

Detailed explanation-1: -People with COVID-19 can spread the virus to other people starting two days before they develop symptoms (or 2 days before the date of their positive test if they do not have symptoms) through 10 days after they develop symptoms (or 10 days after the date of their positive test if they do not have symptoms).

Detailed explanation-2: -You may need to get tested even if you do not have symptoms. You can have COVID-19 and spread it to others even if you do not have symptoms. Your COVID-19 test can be negative even if you are infected. Most people do not test positive for the virus until days after exposure.

Detailed explanation-3: -You are considered contagious from two days before your symptoms begin until 10 days after your symptoms began. If you have no symptoms, you are considered contagious beginning two days before your test sample was collected and until 10 days after your test sample was collected.