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.
A newly published study on the prevalence of the novel coronavirus in Spain found that only 5% of the country’s population has developed antibodies, providing proof that herd immunity to COVID-19 may not be achieved.
