The exchanges show RFK Jr. making false claims about Covid-19 vaccines at the height of the pandemic, citing online articles by fellow vaccine skeptics, linking childhood immunizations to autism, and raising doubts about the flu shot. The emails span more than two years, starting in late 2020. While many of his controversial beliefs have been publicly examined, the emails — provided to STAT on Tuesday — show him in unguarded, personal moments.

As President Trump’s top health official, RFK Jr. would have broad power to shape U.S. vaccination policy, and a bully pulpit from which he could discourage — or encourage — people to get vaccinated. Both Republican and Democratic senators have expressed concerns about Kennedy’s history of criticizing vaccines, and he is likely to face probing questions on the topic in his hearings.

“Bobby, I’ve been working in the ICU for the past two weeks and have taken care of too many people who have died, or will likely die soon, from Covid. None of them are vaccinated,” she wrote in an email dated Feb. 12, 2022. “I watched a daughter collapse on the floor while we pronounced her mother’s time of death. I held the hand of a man who was about to get intubated. He looked at me with tears in his eyes, asking me to please save him. He will likely die in the coming days.”

That same day, Kennedy responded: “Kerry. I don’t dismiss your experience but it differs with data we are seeing from Israel, UK and other nations with much more reliable data systems. You might want to ask your hospital to publish this data so that people can take it seriously. That problem is that CDC has been using corrupt metrics to assess who is vaccinated. CDC counts all people as ‘unvaccinated’ until two weeks after their second shot. We have seen dramatically increased cases and mortalities in the two weeks following the first shot and CDC counts these as unvaccinated.”