Day 2 of the 2024 Republican National Convention

Robert Kennedy Jr. and former President Donald Trump.

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

Kennedy III posted the brief video on social media Tuesday morning, filming Kennedy Jr. as he listens to Trump speak on the phone. Kennedy III said the video was taken on Sunday, the day after Trump was injured in an assassination attempt at a campaign rally in Butler, Pennsylvania.

Kennedy III has deleted the post containing the video.

In the video, Trump can be heard discussing the amount of doses of vaccines that are scheduled for children and suggested that after taking a high volume of vaccines, babies start to change.

Trump also appeared to express some skepticism toward public health professionals who accurately state the recommended immunization schedule for children is safe and effective, saying, “And then you hear it doesn’t have an impact, right?”

Kennedy Jr. apologized to Trump for the video of the phone call being released after his son took it down. Trump and Kennedy met in-person in Milwaukee on Monday. 

False claims: As a candidate, Kennedy Jr. has repeatedly made false claims about the safety and efficacy of vaccines. He’s regularly criticized Trump for approving public health restrictions during the Covid-19 health pandemic and implementing a plan to accelerate the development of a Covid vaccine. 

Biden campaign responds: President Joe Biden’s campaign said in a statement Tuesday: “Trump and his anti-vax bud ‘Bobby’ are spreading dangerous conspiracy theories that threaten the lifesaving care that tens of millions of people depend on.”

“This leaked footage is further proof Trump can’t be trusted to protect Americans’ health care. It’s frightening, and if he gains power, it could be the devastating reality for working families across the country,” the statement said.

CNN has reached out to the Kennedy campaign and the Trump campaign for comment. 

This post has been updated with comments from Biden’s campaign.