Acute poliomyelitis: still an ever-present threat.
D005243:Feces / Q000382:microbiology; D006801:Humans; D011051:Poliomyelitis / Q000209:etiology / Q000382:microbiology / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral
D011055:Poliovirus Vaccine, Oral