COVID-19 immunity lasts at least 8 months and expects vaccine lifespan: study

People who have recovered from Covid have immunity to reinfection for eight months, the study said.

Melbourne:

People who have recovered from a new coronavirus infection have immune memory to protect them from reinfection for at least eight months, according to a new study that provides strong evidence that the COVID-19 vaccine may function for a long time. ..

Previous studies have shown that antibodies to the coronavirus decline after the first few months of infection, raising concerns that people can quickly lose their immunity, but Science Immunology reports. New research published has alleviated these concerns.

According to scientists, including researchers at Monash University in Australia, certain cells in the immune system, called memory B cells, “remember” a viral infection and protect it through rapid production when re-exposed to the virus. Causes an immune response. Defensive antibody.

In this study, researchers recruited a cohort of 25 COVID-19 patients and collected 36 blood samples from 4 days post-infection to 242 days post-infection.

Scientists have found that antibodies to the virus began to decline 20 days after infection.

However, they said all patients had memory B cells that recognized one of the two components of the virus-peplomer and nucleocapsid proteins that help the virus enter the host cell.

Based on their analysis, the researchers said that these virus-specific memory B cells were stable until 8 months after infection.

Scientists believe the findings give hope to the effectiveness of the vaccine against the virus, an example of a genuine reinfection among millions of people who test positive for the virus worldwide. It also explains why there are few.

“These results are important because they clearly show that patients infected with the COVID-19 virus actually have immunity to the virus and the disease,” said study co-author Monash University Immunity. Undergraduate Menno van Zelm said. Pathology.

“This is a black cloud of potential protection provided by the COVID-19 vaccine, and as one or more vaccines are developed, they provide long-term protection. Gives us real hope, “says van Zelm.

(This story has not been edited by NDTV staff and is automatically generated from the syndicate feed.)

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