Diseases & National Health Programme
Factors favouring eradication of small pox are all except (AIPG 12)
|A|| Subclinical infection does not spread|
|B|| Very efficient vaccine|
|C|| Cross immunity with animal pox present|
Smallpox eradication - Epidemiological basis –
It is useful to consider the epidemiological factors which have led to the eradication of smallpox; these could form the basis for the eradication of other similar diseases:
1. No of cases comparatively simple to diagnose because of rush distribution. No known animal reservoir.
2. No long-term carrier of the virus
3. Life-long immunity, after recovery from the disease
4. The detection was so characteristic and occurred in visible parts of the body.
5. Persons with subclinical infection did not transmit the disease
6. Vaccine highly effective; easily administered, heat stable and confers long-term protection.
7. International cooperation