Efficacy Rates

Efficacy rates describe how well a vaccine prevents a disease in clinical studies. For example, an 80% efficacy means that vaccinated people are 80% less likely to get the disease compared to those who are unvaccinated, under the conditions of the study. It’s important to understand that efficacy isn't a guarantee that you won’t get the disease, but rather an indication of its effectiveness in reducing risk for the population studied. Real-world effectiveness can vary based on factors like age, health, and virus variants.