The World Health Organization (WHO) is one of the many groups that monitor for diseases around the world. It’s their job to collect health information from people in many different countries. Part of the information they collect is about side effects to medications (and a vaccine is a type of medication). It’s also their job to make recommendations that help to keep people around the world healthy and safe.
Another organization is the Center for Disease Control and Prevention (CDC). This organization is focused on diseases that affect people in the United States. The CDC also reviews recommendations from a group of experts called the Advisory Committee on Immunization Practices (ACIP) and uses these recommendations to publish the official childhood immunization schedule.
American Academy of Pediatrics is the last organization for today. This organization focuses specifically on the health and wellness of children. It is comprised of many different experts who give recommendations to keep our children as safe and healthy as possible.
Between these three organizations, there is a LOT of research going on ALL of the time. Think about how many hundreds of people are working on learning more about diseases, looking into the risks of certain diseases to people of different ages, and fine tuning what we can do to prevent anyone from suffering from these diseases. That’s a lot of great minds from all over the world working together to find the best solution.