Herd Immunity and Population Protection — MCQs

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?

The primary mechanism by which herd immunity protects a population is by:

In a vaccine trial, relative risk is 0.2. What is the vaccine efficacy?

Assertion: VZV vaccine is live attenuated. Reason: It cannot be given to immunocompromised patients.

Which of the following vaccines is classified as a killed vaccine?

To achieve a Net Reproduction Rate (NRR) of 1, the couple protection rate should be

In a population of 5000, there are 19 % eligible couples. To achieve a couple protection rate (CPR) of 60 %, how many of these should be covered for family planning services?

Twelve elderly residents living in an assisted care facility suffered from sinusitis, otitis media, and mild pneumonias during midwinter. Despite having all received the 13-valent pneumococcal conjugate vaccine recently licensed for adults, S. pneumoniae was isolated from 10 of the patients. Which of the following is the best explanation for the pneumococcal infections?

Which ion is added to the Oral Polio Vaccine (OPV) to act as a stabilizer?

Which of the following is a live vaccine?