[Implementing secondary poliomyelitis vaccination].

Revaccination is necessary also in poliomyelitis immunisation. Recommendations concerning type and frequency of vaccination vary. According to the results of an investigation in vaccinating patients 10-20 years after the last oral vaccination life vaccine can be administered for revaccination. After more than 20 years patients are seronegative. Therefore, a new basal immunisation is necessary after prevaccination with inactivated vaccine.