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.