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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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