Herd immunity occurs when a high percentage of a population is immune to a disease, preventing its spread. Vaccination policies aim to build community immunity, with thresholds varying depending on the disease. Regular boosters are important, and herd immunity has led to the eradication of smallpox and rare cases of polio and diphtheria. It is […]
Herd behavior, seen in both animals and humans, can have negative or positive consequences. It can lead to panic, stampedes, and violence, but also protect the survival of a group. Examples include stock market crashes and Black Friday sales. The herd is motivated by self-interest, and individuals often look to others for clues on how […]
