De l'album Moderator's Photos
Wild poliovirus type 1 and Circulating vaccine-derived poliovirus cases
- See more at: http://www.polioeradication.org/Dataandmonitoring/Poliothisweek.aspx#sthash.o1UpAO3m.dpuf
20 Octobre 2015
·
il y a 8 ans
- See more at: http://www.polioeradication.org/Dataandmonitoring/Poliothisweek.aspx#sthash.o1UpAO3m.dpuf
