Outbreak of poliomyelitis in Ecuador

In North America the two highly industrialized countries, Canada and the United States, have limited the disease in- cidence to a few cases per year by means

Following a mass vac- cination campaign carried out in mid-August, the out- break was brought under control (see

TABLE &Confirmed poliomyelitis cases among Venezuelan children vaccinated with three or less than three doses of Sabin oral vaccine, 1971. TABLE 7-Results of

available assistance and undertaking poliomyelitis control programs in the Americas as indicated by. the studies and by

immunization programs, effort be made to achieve the highest immunity level as quickly as possible. by conducting mass oral vaccination campaigns of the shortest possible duration

It is necessary, however, to emphasize the advantages of permanent anti-aegypti measures throughout the Americas; not the measures developed by Gorgas and Oswaldo

Geographic distribution of the study children, showing the number of these children in each de- partment, the number unvaccinated against poliomyelitis (in

The Institute's influenza laboratory began a study of paired sera obtained from persons suffering from res- piratory infections in May and June with a view to