People can develop temporary natural immunity after recovering from COVID-19. However, vaccines are the best way to train the immune system to recognize viruses. When a vaccinated person encounters ...

Largest review and meta-analysis assessing the extent of protection following COVID-19 infection by variant and how durable that protection is against different variants, including 65 studies from 19 ...

Every year, as the weather shifts whether from summer to monsoon, or monsoon to winter people suddenly start complaining of runny noses, sore throats, coughs, allergies, and fatigue. Doctors’ waiting ...