People who have recovered from the novel coronavirus infection have an immune memory that lasts for at least eight months before recurring, according to a new study that provides strong evidence that COVID-19 vaccines are likely to work for a long time Infection protects.
While previous studies have shown antibodies to the coronavirus decline after the first few months of infection, raising concerns that people could lose their immunity quickly, those concerns are allayed by the new study published in the journal Science Immunology.
According to scientists, including those from Monash University in Australia, certain cells in the immune system called memory B cells “remember” infection by the virus and, when exposed to the virus again, rapidly trigger a protective immune response Production of from protective antibodies.
In the study, the researchers recruited a cohort of 25 COVID-19 patients and withdrew 36 blood samples from them from day 4 after infection to day 24 after infection.
The scientists found that antibodies to the virus fell off 20 days after infection.
However, they said that all of the patients continued to have memory B cells that recognized one of two components of the virus – the spike protein, which helps the virus enter host cells, and the nucleocapsid proteins.
Based on their analysis, the researchers said that these virus-specific storage B cells were stable for up to eight months after infection.
The scientists believe the results give hope for a vaccine against the virus and also explain why there have been very few examples of true reinfection in millions of people who tested positive for the virus worldwide.
“These results are important because they definitely show that patients infected with the COVID-19 virus actually retain immunity to the virus and the disease,” said study co-author Menno van Zelm of the institute for Immunology from Monash University and Pathology.
“This was a black cloud hanging over the potential protection any COVID-19 vaccine could offer and gives real hope that once one or more vaccines are developed, they will provide long-term protection,” said van Zelm.
(This story was not edited by GossipMantri staff and is automatically generated from a syndicated feed.)