A world free from polio?
Wyatt
H V
HV
D005243:Feces / Q000821:virology; D006801:Humans; D007757:Laboratory Infection / Q000276:immunology / Q000821:virology*; D011051:Poliomyelitis / Q000276:immunology / Q000821:virology*; D017955:Poliovirus / Q000302:isolation & purification