The latest Covid-19 vaccines from Pfizer and Moderna tend to be exceptionally effective at avoiding severe illness.
Public health authorities and drug manufacturers need to be open regarding the side effects of coronavirus vaccines, doctors say.
Patients with Type O or B blood spent less time in ICU than those with Type A or AB.
With no guidance from the White House on how to react to worsening outbreaks, even some previously hesitant governors are enforcing restrictions.
A surgical mask is a loose-fitting disposable mask that covers the nose and mouth of the wearer from contact with droplets.