Polio vaccines? Bad example. Whatever good they did in the past, most outbreaks of polio in the world today are triggered by oral vaccine rollouts. https://www

Polio vaccines? Bad example. Whatever good they did in the past, most outbreaks of polio in the world today are triggered by oral vaccine rollouts. https://www.cdc.gov/mmwr/volumes/70/wr/mm7049a1.htm https://www.cdc.gov/mmwr/volumes/70/wr/mm7049a1.htm https://abcnews.go.com/Technology/wireStory/polio-outbreak-sudan-caused-oral-vaccine-72766683 https://abcnews.go.com/Technology/wireStory/polio-outbreak-s... https://abcnews.go.com/Health/wireStory/polio-cases-now-caused-vaccine-wild-virus-67287290 https://abcnews.go.com/Health/wireStory/polio-cases-now-caus...