Kennedy Jr.'s announcement that the Centers for Disease Control and Prevention will no longer recommend COVID vaccines for "healthy children and healthy pregnant women" follows years of spurious and misleading claims he made about the vaccine.

It's been a busy week for Robert F. Kennedy Jr. – from updating the COVID vaccine guidelines to his proposed changes to top medical journals.

Infectious disease experts say mRNA vaccines have been studied for decades, they are safe and effective, and were instrumental in saving lives during the COVID pandemic.

This week, mRNA vaccines are set to face intense scrutiny from critics in Congress. Here's an explainer of how we know they are safe and effective.

Though the government may no longer recommend COVID vaccines for many children and pregnant people, you doctor still might.

A new material developed at Cornell University could significantly improve the delivery and effectiveness of mRNA vaccines by replacing a commonly used ingredient that may trigger unwanted immune responses in some people.

U.S. Health Secretary Robert F. Kennedy Jr. on Tuesday announced that COVID-19 vaccines are no longer recommended for healthy children and pregnant women —

Insurance coverage typically follows federal recommendations, so anyone who is healthy and under 65 is likely to have to pay out of pocket to get the shot ‒ which runs about $200 ‒ if they can get it. It's not clear what insurance companies will do about the new recommendations.