Do doctors control what is put into vaccines?

Doctors do not control what is put into vaccines. Vaccines are developed and manufactured by pharmaceutical companies, with input from government agencies such as the Centers for Disease Control and Prevention (CDC), the Food and Drug Administration (FDA), and the National Institutes of Health (NIH). These agencies work together to ensure vaccines are safe and effective.

The ingredients in vaccines are carefully studied and approved by the FDA before they can be used in the public. Vaccines are constantly monitored for safety, and any potential side effects are carefully studied and communicated to the public.