Scientists and doctors are still learning about the body’s immunity to COVID-19, though they now believe that if someone has been exposed to the virus, this person may be immune for at least a few mon …
( read original story …)
The HongKong News
Scientists and doctors are still learning about the body’s immunity to COVID-19, though they now believe that if someone has been exposed to the virus, this person may be immune for at least a few mon …
( read original story …)