Read the excerpts from the On Immunity: An Inoculation opinion piece and the “Herd Immunity” infographic. On Immunity: An Inoculation If we imagine the action of a vaccine not just in terms of how it affects a single body, but also in terms of how it affects the collective body of a community, it is fair to think of vaccination as a kind of banking of immunity. Contributions to this bank are donations to those who cannot or will not be protected by their own immunity. This is the principle of herd immunity, and it is through herd immunity that mass vaccination becomes far more effective than individual vaccination. Herd Immunity Section I. No one is immunized. Contagious disease spreads through the population. Section II. Some of the population gets immunized. Contagious disease spreads through some of the population. Section III. Most of the population gets immunized. Spread of contagious disease is contained. Which statement is best supported by the information in both excerpts? A. Vaccination of single individuals has the potential to affect both those vaccinated and the greater community.
B. Mass vaccination is only effective when every individual in a community is actually vaccinated.
C. An unvaccinated person’s chance of immunity decreases when the greater community is vaccinated.
D. Vaccinations are the only way to protect individual citizens of a community from disease.