Cite
MLA Citation
Laura V Cooper et al.. “Risk factors for the spread of vaccine-derived type 2 polioviruses after global withdrawal of trivalent oral poliovirus vaccine and the effects of outbreak responses with monovalent vaccine: a retrospective analysis of surveillance data for 51 countries in Africa.” Lancet infectious diseases, vol. 22, no. 2, 2022, pp. 284–294. http://access.bl.uk/ark:/81055/vdc_100150526913.0x000011