Vitamin D is good for your body and immunity, but too much can be bad as well.
A specific period may allow SARS-CoV-2 to make a vaccinated person a carrier.
People exposed to COVID-19 may develop years of immunity.
A mutation is linked to the contagiousness of the COVID-19 virus.
An American biotechnology company announces interim positive results of a COVID-19 vaccine.
An antioxidant enzyme is found as a potential COVID-19 treatment.
