Epidemiological Investigation of the First Case Caused by Type I Vaccine Highly-mutant Poliovirus in Beijing

Objective To investigate the first case of a type I Vaccine Highly-mutant Poliovirus( VHMPVⅠ)in Beijing. Method S We conducted an epidemiological investigation with virus excretion monitoring,risk assessment,disinfection,and isolation. Results The case,a Beijing resident with a perianal abscess,received one dose of oral polio vaccine( OPV),and had stayed in Hebei with his mother before paralysis onset. Three qualified stool samples were...