Your immune system defends your body against infections and illnesses. It makes proteins called antibodies that counteract or kill germs, like viruses and bacteria. You get protection, or “immunity,” ...

The innate/general resistance system and the adaptive system are the two main subsystems of the immune system. To generate an efficient immune response, the innate and adaptive systems constantly ...

Herd immunity occurs when enough people in a group are immune to a specific infection that it cannot spread easily from person to person. Vaccination programs have been successful in creating herd ...

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 ...