[Seroepidemiologic research on the antipoliomyelitic immunity in adult unvaccinated subjects].

The Authors carried out a serological research on the polimyelitis viruses in 727 adult subjects who had not been vaccinated orally. The results of the titration of the neutralizing antibodies showed that the situation of immunity with respect to poliomyelitis is still satisfactory. However, the difficulty of making an exact estimation of the duration of the state of immunity to poliomyelitis, and the persistent, though reduced, circulation of wild polioviruses are such that a continuous epidemiological control is advisable.