Since 1988, more than 2.5 billion children have been immunized against polio.
— HumanProgress.org (@HumanProgress) February 26, 2020
New infections fell by more than 99.99%, from 350,000 annual cases to just 22 new cases across 3 countries in 2017.#HeroesOfProgress https://t.co/x7wCK3Dguc
Sunday, March 22, 2020
Since 1988, more than 2.5 billion children have been immunized against polio
