Which statement about Herd Immunity is NOT true?

• A. Replaces the need for vaccinations
• B. Protects people who can't receive immunizations/vaccines
• C. Requires most people to be immunized to be effective
• D. Reduces the risk of disease from spreading to other people

Answer: (A)

Herd immunity occurs when a large portion of the population is immune to a disease, which makes it harder for the infection to spread and provides protection to people who are not immune. The statement that it replaces the need for vaccinations is not true because vaccines are how we build the necessary level of immunity in the community; relying on natural infection would cause widespread illness and deaths. In practice, herd immunity protects vulnerable individuals who cannot be immunized and reduces overall transmission. It requires a high level of immunity in the population to be effective, with the exact threshold depending on how contagious the disease is. By lowering transmission, it decreases the likelihood that the disease will spread from one person to another, safeguarding the community as a whole.