Sero Survey | IASbaba

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Sero Survey

Part of: GS Prelims and GS – III- Governance

Key Findings of Fourth National Sero Survey 

  • Two-thirds of India’s population have antibodies against the coronavirus.
  • 67.6% of adults were seropositive, while more than 62% of adults were unvaccinated. 
  • About 400 million of India’s 1.4 billion people did not have antibodies.

What is Sero Survey?

  • Sero studies popularly known as sero survey examines how many people in a population have been infected with COVID-19
  • Sero survey broadly indicates following things; 
    • The percentage of the population exposed to the virus. 
    • Which groups are more exposed or have had higher rates of infection
    • How infection rates are progressing in a particular area.
    • How far are we from herd immunity.

How is Sero Survey Done?

  • The blood serum (fluid part of plasma) of a group of individuals is examined for antibodies (not the virus itself) that are developed in response to virus exposure. 
  • Seropositive=> Presence of antibodies => exposed to Coronavirus
  • Everybody cannot be tested, only a few people chosen at random are tested. The results are an estimate of the proportion of people who have been infected in the past.



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