Delta variant, which has a higher chance of spreading, struck Kerala during the second wave of COVID-19 and that the number of people infected by it increased because of the huge population in the state. "In addition, the disease spreads rapidly across the State due to the interconnectedness of rural and urban areas," he said.
Since people already infected by COVID and those who have been vaccinated have limited immunity against the Delta variant, it can lead to infection recurring in those infected in the past, he said. "Many of those who are now positive fall into these categories.
It is reassuring that they have no serious symptoms and no risk of death," he said. He said the sero prevalence study of the Indian Council of Medical