Billionaire Bill Ackman joins Joe Rogan, Elon Musk in calling for a vaccine debate—though says he's 'not an anti-vaxxer'

Hedge fund investor Bill Ackman waded into an ugly fight between his fellow billionaires on whether there should be a high-profile debate on the effectiveness and safety of COVID vaccines. On Saturday evening, the founder of Pershing Square Asset Management backed a pledge from podcast host Joe Rogan to donate $100,000 to charity if Dr. Peter Hotez, a professor and critic of vaccine misinformation on Rogan’s show, would debate presidential candidate and vaccine skeptic Robert Kennedy Jr. Ackman offered an additional $150,000, arguing that such a debate “would enable the...