Effect of Inactivated Poliovirus Vaccine Campaigns, Pakistan, 2014-2017
Grassly NC, Wadood MZ, Safdar RM, Mahamud AS, Sutter RW.
Emerg Infect Dis. 2018 Nov;24(11):2113-2115.
https://wwwnc.cdc.gov/eid/article/24/11/18-0050_article