Robert F. Kennedy Jr., the anti-vaccine activist and member of one of America’s most prominent political families, has announced his candidacy for the presidency. Kennedy, who is 69 years old, filed his statement of candidacy with the Federal Election Commission on Wednesday, but his bid to challenge incumbent President Joe Biden for the Democratic nomination is considered a long shot. His organization, Children’s Health Defense, which promotes the idea that vaccines are unsafe, thrived during the COVID-19 pandemic, with its revenue more than doubling to $6.8 million in 2020. Public health experts have criticized Kennedy’s work, calling it misleading and dangerous, and accusing the organization of spreading false claims to people who may be wary of vaccines, resulting in unnecessary deaths. Kennedy has also pushed the conspiracy theory that the 2020 presidential election was stolen and has appeared alongside anti-democratic figures, including Roger Stone and Michael Flynn.