Placenta as tissue culture for virus propagation.
D005260:Female; D006801:Humans; D010920:Placenta; D011051:Poliomyelitis; D017955:Poliovirus / Q000208:ethnology*; D011247:Pregnancy; D012107:Research Design; D012147:Restaurants; D012499:Sanitation
POLIOMYELITIS VIRUS/culture; RESTAURANTS; SANITATION