Health officials around the world are racing to vaccinate enough people to stop the spread of COVID-19, but what qualifies as “enough” is still an open question.
The goal is to get to “herd immunity,” which is when enough people have immunity, either from vaccination or a past infection, to stop uncontrolled spread. [TRENDING: ‘Dance Moms’ instructor accused of sex battery on students | Boy dies after homemade igloo collapses | Latest on $1,400 payments] Herd immunity doesn’t make any one person immune, and outbreaks can still flare up.
It means that a virus is no longer easily jumping from person to person, helping to protect those who are still vulnerable to catching it.