Vaccine Efficacy
Vaccine efficacy is the measure of the effectiveness of a vaccine in preventing the development of a specific disease in a population under ideal conditions. It is calculated as the percentage reduction in disease incidence in a vaccinated group compared to an unvaccinated group, under controlled conditions. Vaccine efficacy is influenced by various factors such as the type of vaccine, the age and health status of the population, the prevalence of the disease, and the timing and number of doses. A high vaccine efficacy indicates that the vaccine is highly effective in preventing the disease, while a low vaccine efficacy indicates that the vaccine is less effective in preventing the disease.
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