You are the MO in charge in a PHC and there has been a plague epidemic in your area. Which of the following measures is the LEAST appropriate for controlling epidemic?
AIsolation of contacts
BRapid treatment of cases with streptomycin
CVaccination of all susceptible individuals
DEarly diagnosis and notification
The primary mechanism by which herd immunity protects a population is by:
AReducing transmission by decreasing susceptible individuals in the population
BIncreases with increased vaccination
CIs related to vaccine efficacy
DApplies only to infectious diseases
In a vaccine trial, relative risk is 0.2. What is the vaccine efficacy?
A90%
B80%
C95%
D20%
+ 7 more in the PDF
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