Volume 11, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



A fecal survey for polioviruses in normal Chinese children and a serological survey for antibodies to all 3 types of poliovirus among a sample of the Chinese population were carried out in Hong Kong.

The carrier rate for polioviruses in normal Chinese children under 5 years was found to be 20.5 per 1,000 with a high incidence in the age groups of 6 to 12 and 13 to 24 months. The percentage of non-polio enterovirus excretors was 9.1%, as determined by tests in monkey kidney cultures.

Among the Chinese population of Hong Kong, about 62% of the children had actively acquired neutralizing antibodies to all three types of poliovirus, and 81% to 87% for any one type, by the time they attained the age of 5 years. This figure rose to 78% for all 3 types, and 88% to 94% for any one type, between the age of 5 and 9 years, and to 94% for all 3 types and 98% for any one type in adult life.

This implies that all 3 types of poliovirus are widely distributed in the community, and the rapid acquisition of type 1 antibody by infants of 7 to 12 months of age corresponded to the predominance of poliovirus type 1 in clinical cases reported during the summer of 1960.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...


Most Cited This Month

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error