Pharmaceutical rivals don’t often come to each other’s defense. But after the US Department of Health and Human Services terminated a contract with drugmaker Moderna to develop an mRNA bird flu vaccine,

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.

The Centers for Disease Control and Prevention now says that kids with no underlying health conditions "may receive" COVID-19 vaccines, dropping a broad recommendation for all children to get vaccinated against the virus.

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.

The Covid-19 vaccine remains on the CDC's revised schedule of childhood vaccinations despite HHS Secretary Robert F. Kennedy Jr.'s announcement.

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.

The department cited Moderna’s use of the messenger RNA technology, which it said “remains under-tested,” for the cancellation of the funding.

Health Secretary Robert F. Kennedy Jr. recently announced more key changes to the CDC recommendations for COVID-19 vaccination. Two health experts answer questions about what the changes mean.

HHS has notified Moderna that it is canceling a nearly $600 million contract for vaccines for flu strains that could trigger future pandemics.