In a contentious Senate hearing marked by raised voices and heated exchanges, Health and Human Services Secretary Robert F. Kennedy Jr. faced calls to resign from Democrats and unexpected criticism from Republicans.

Several Republican senators brought up the legacy of President Donald Trump’s Operation Warp Speed, which sent a safe COVID vaccine to the public in record time, helping save millions of lives. They pushed Kennedy to explain his current approach to the shots and mRNA technology.

The latest COVID vaccines come with new FDA limits

The Food and Drug Administration approved the next round of COVID-19 vaccines, but is restricting them to people at high risk for COVID complications.

Under his leadership, the health agency cancelled hundreds of millions of dollars in research fund

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