From CNN.

Robert F. Kennedy Jr.’s son, Bobby Kennedy III, posted a video of a phone call between Kennedy and former President Donald Trump in which the former president appeared to endorse false theories about the safety of vaccines.

All vaccines that are approved or authorized for use in the United States have been proven safe and effective through rigorous scientific study. Severe allergic reactions are exceedingly rare – occurring in roughly 1 in 1 million people. Far more common are mild side effects, such as pain or swelling at the injection site, which tend to subside quickly. Worldwide, vaccines prevent more than 4 million deaths every year, according to the World Health Organization. While there is still no scientific consensus on what causes autism, vaccines, conclusively, do not.