Pfizer-BioNTech-based vaccines and Moderna's based mRNA provide "continuous" protection that lasts for years on Covid-19, a new study published in the Environment report on Monday.
"Our research shows that vaccination of people with SARS-CoV-2 mRNA stimulates GC (Germinal Center) B cell response, which activates the immune system," said the authors of their study, referring to memory cells found in lymph nodes, where cells immune systems are taught to detect and fight the virus.
Booster doses of these vaccines may not have been needed as they had previously sounded necessary, unless the virus mutates beyond its current variants.
Ali Ellebedy, a gynecologist at Washington University in St. Louis. Louis, who led the study, told The New York Times that they were not looking at the Johnson & Johnson vaccine, but added that they expected it to be less effective than mRNA-based vaccines. And not included, it turned out, was AstraZeneca, which sells in India as a Covishield.
But the good news for India, which is fighting the second destructive wave of Covid-19 driven in part by a separate SARS-CoV2 Delta, is to participate in high-level negotiations to find a way to authorize Pfizer- BioNTech and Moderna vaccines.
Previous studies have shown that only those who survived Covid-19 infection and who were completely vaccinated received permanent and permanent protection against the virus.
After infection, a special structure called the pathogen builds the lungs, which serves as a school of memory B cells to detect the virus. In vaccinated individuals, these decomposing centers are formed in the lymph nodes in the armpits.
"Everyone is constantly focusing on mutations - this shows that B cells do the same thing," Marion Pepper, a pathologist at the University of Washington in Seattle, told by an prominent news agency. This is also believed to protect against several other mutants and their outbreaks.
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