Which of the following is a correct statement about herd immunity?ANSWERHighly infectious pathogens that have an airborne transmission require a lower vaccination rate.Even if a community’s herd immunity dips below certain thresholds, outbreaks are unlikely.Most pathogens that we routinely vaccinate against require that at least 95 percent of the total population is immune in order to have effective herd immunity.The percentage of a population that must be vaccinated for herd immunity to be effective varies based on the pathogen.
Question
Which of the following is a correct statement about herd immunity?ANSWERHighly infectious pathogens that have an airborne transmission require a lower vaccination rate.Even if a community’s herd immunity dips below certain thresholds, outbreaks are unlikely.Most pathogens that we routinely vaccinate against require that at least 95 percent of the total population is immune in order to have effective herd immunity.The percentage of a population that must be vaccinated for herd immunity to be effective varies based on the pathogen.
Solution
The correct statement about herd immunity is: "The percentage of a population that must be vaccinated for herd immunity to be effective varies based on the pathogen."
This is because different pathogens have different rates of transmission and severity, which affects the percentage of the population that needs to be immune to prevent its spread. For example, measles, a highly contagious disease, requires about 95% of the population to be immune to achieve herd immunity. Other diseases may require a lower percentage.
The other statements are incorrect. Highly infectious pathogens that have airborne transmission typically require a higher, not lower, vaccination rate due to their ease of spread. If a community’s herd immunity dips below certain thresholds, outbreaks are more likely, not unlikely. And while many pathogens that we routinely vaccinate against do require high levels of immunity in the population, it's not accurate to say that most require at least 95 percent of the total population to be immune for effective herd immunity.
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