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 ...

Decision makers should take both natural immunity and vaccination status into consideration to obtain a full picture of an individual's immunity profile." Since January 2021, several studies and ...

Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. Seroprevalence surveys suggest that from the beginning of the pandemic to 2022, more than a third ...

There were claims during the pandemic that natural immunity was not as strong as vaccinated COVID immunity. Those claims have been proven to be completely wrong by scientific studies. Natural immunity ...

Cases of people testing positive for COVID-19 after having had the virus previously, including among some folks who also got vaccinated, have raised questions about how much immunity people get from ...

People living in regions where malaria outbreaks are common experience repeated exposure to the disease, which gradually teaches the body how to fight back. Over time, they develop naturally acquired ...

Dr. Anthony Fauci said in a 2004 video that a woman who had recently had influenza didn’t need to get a flu vaccine. The science on the durability of immunity from a COVID-19 infection isn’t clear, ...

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 ...