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Immunity after COVID-19 infection may persist for several months: research



According to a new study, COVID-19 immunity after an infection has been confirmed to last for at least five months.

CNN reports which researchers also suspect it could take much longer than that.

Although previous reports have noted that individuals infected with COVID-19 more than once, meaning a lack of antibody immunity, the human body reacts differently to the virus. The report notes that about 90% of people recovering from COVID-19 maintain stable antibody counts instead of seeing them die.


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Research – published in the journal Science – antibody responses were sampled from more than 30,000 patients diagnosed with COVID-19 in the Mount Sinai Health System from March to October. When analyzing the reactions of the antibodies, researchers have classified the strength as low, medium or high.

More than 90% produced moderate to high amounts of antibodies to bind to virus cells.

“While some reports say that antibodies to this virus disappear rapidly, we’ve found the opposite – that more than 90% of people with mild or moderate illness produce an antibodies to this virus. The antibody response was strong enough to neutralize the virus and Florian Krammer, professor of immunization at Icahn School of Medicine in Mount Sinai, said the response was maintained for months. research.

During the study, the scientists then examined 121 patients who eventually donated their plasma after recovery. They looked at the plasma three months after the patient’s first symptoms appeared, and again for another five months.

While the total amount of antibodies decreased, the others remained.

Ania Wajnberg, director of clinical antibody testing at Mount Sinai, said: “The level of the sustained antibody we observed was then likely to be produced by long-lived plasma cells in the bone marrow. “. and that probably means they’re here to stay. We will continue to monitor this group from time to time to see if these levels remain as stable as we suspect they are, and hopefully they will. “

Wajnberg also said that the measured antibody volume was probably produced by the cytoplasm, acting as the first line of defense against invading viruses. Over time, their strength fades, giving way to more stable antibodies.

The results, although interesting, do not draw conclusions about whether coronavirus infection can protect recovering patients.

“Although this cannot provide conclusive evidence that these antibody reactions protect against reinfection, we do believe that they will most likely reduce reinfection rates,” the report writes.

While learning about COVID-19, the researchers say they will be looking at for the protective correlations, which are measurable markers from a blood test to let doctors know if someone is immune or not.


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