| [levels of specific antibodies against poliomyelitis virus and degree of immune protection in umbria population]. | the authors studied neutralizing antibodies against poliomyelitis wild viruses in a sample of umbria population. the number of seronegative results for each virus strain was very low (less than 1%). the geometric mean titres were 21.07, 26.72, 19.13 for poliovirus types 1, 2, 3, respectively. the results of this seroepidemiological study shows that the umbria population is satisfactory protected against the poliomyelitis. | 1979 | 229884 |