Add Yahoo as a preferred source to see more of our stories on Google. The human immune system is a complex defense mechanism that aims to keep us healthy and safe from viruses, bacteria and all other ...

LITTLE ROCK (KATV) — With a coronavirus vaccine now being administered in Arkansas, health officials say it’s starting to stimulate immunity against the disease. The first round of Moderna and Pfizer ...

The popular conception of a “vaccine” is that it is an inoculation that makes you immune to a pathogen — if not for life, at least for a very long time. On that principal, much of the world’s hope for ...