Oral cholera vaccine is effective for: September 2005
Ans. D: 3 years Oral vaccine is effective for at least 3 years. Injectable vaccine is effective for 3-6 months and protective value is about 50%. Proguanil and antibiotics should be avoided from one week before and one week after the administration of the live oral attenuated vaccine
6 months
12 months
2 years
3 years