| seroepidemiological evidence of widespread enteroviral infection in anambra state, nigeria. | serum samples from 339 apparently healthy subjects, 298 adult blood donors and 41 infants aged 21 months and below, were screened for neutralising activity against poliovirus 1 and coxsackieviruses a7 and b4. among the adult serum samples 85% showed high activity (greater than or equal to 320) against poliovirus 1 while frequencies of similar activities were 65% and 64% for coxsackieviruses a7 and b4 respectively. about 60% showed multiple activity against all three viruses; 15% against both cox ... | 1990 | 1966236 |