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Express News Service THIRUVANANTHAPURAM: The fourth national serosurvey on Covid, which shows how many people developed immunity against the infection, is a wake-up call for Kerala which has a large number of vulnerable people. The report made public partly on Tuesday says that the state still has a large number of people who are not immune to the infection while several states have almost achieved herd immunity. It also explains why the state continues to report a large number of new positives. While it is noted that the pandemic waves did not cause a collapse of the health system, the threat of a third wave could still be damaging if the vaccination drive is not ramped up to create immunity among the susceptible population, according to health experts. The Indian Council of Medical Research survey found that two-third of the population in the country has got immunity by way of infection or through vaccination. 

Padmanabha shenoyIndian council of medical researchNews serviceIndian councilMedical researchபத்மநாப ஷெனாய்இந்தியன் சபை ஆஃப் மருத்துவ ஆராய்ச்சிசெய்தி சேவைஇந்தியன் சபைமருத்துவ ஆராய்ச்சி