A Map A Day

How Herd Immunity Works. I can’t post this enough , especially in these pseudo science bs times. ➖ Herd immunity is the idea that if enough people get immunized against a disease , they'll create protection for even those who aren't vaccinated. This is important to protect those who can't get vaccinated , like immunocompromised children. ➖ You can see in the image , low levels of vaccination lead to everyone getting infected. Medium levels slow down the progression of the illness , but they don't offer robust protection to the unvaccinated. But once you read a high enough level of vaccination , the disease gets effectively road-blocked. It can't spread fast enough because it encounters too many vaccinated individuals , and so the majority of the population (even the unvaccinated people) are