Ending Use of Oral Poliovirus Vaccine - A Difficult Move in the Polio Endgame.
Pallansch MA.
N Engl J Med. 2018 Aug 30;379(9):801-803. doi: 10.1056/NEJMp1808903.
https://www.nejm.org/doi/full/10.1056/NEJMp1808903