This week, President Donald Trump called Operation Warp Speed, a public-private federal program that helped speed up the development and distribution of mRNA Covid-19 vaccines in record time “one of the most incredible things ever done in this country.

While anti-vaxxers are thrilled, experts warn that defunding mRNA development takes away our already-proven best weapon against future pandemics.

This was one in a continuing line of moves that have put Kennedy's vaccine skepticism into public policy, though scientists say the vaccines are safe.