New Delhi: The single dose of Covid-19 vaccine can be sufficient for adults who have been infected with a virus, the two recent studies in India suggest. WHO and Union Ministry of Health and Welfare Family have recommended getting a double dose vaccine photo, but the study writer said their findings could help promote the use of “greater” vaccines and larger population coverage.
The first study was conducted by researchers at AIG Hospital, Tertiary Care Facilities in Hyderabad, the results were published in the ‘International Journal of Infectious Diseases’ in May. They registered 280 vaccinated health workers between January 16 and February. They were divided into two groups – those who had been infected with Covid-19 (131) and those who had not yet been (149). Everything is vaccinated with two doses of covishield, 28 separate days, go by government guidelines at that time. Blood samples were taken at first and at the end of the study, and were tested for two things – antibodies and memory cells (immune cells that could recognize foreign particles encountered earlier).
“At the end of four weeks, we found the Covid-19 group has developed 1,000 units of antibodies, 10 times produced in the non-covid-19 group,” said Dr. D Nageshwar Reddy, a research writer and the author of the Chairman of the AIG Hospital. As for memory cells – called T cells and B cells, which form the main part of our immune response – they find a better response to the Covid-19 group. “There are two types of T, CD4 and CD8 cells. The response was three times higher in the Covid-19 group than others,” he added. With that basis, he continued, “Our advice is only taking one dose.”
Another study was conducted by the University of Banaras Hindu in April, which has been accepted for publication in the ‘Immunology of Science’. Prof. Gyaneshwar Chaubey from the Zoology Department led this study, carried out on a scale smaller than 20 people, half of them had been infected and half did not. Both groups are given a dose of covishield and their antibodies are checked every week, for a month.
