Virus Immunity Not Long Lasting: Study
The New Indian Express Chennai|July 14, 2020
After a UK study suggested that immunity generated in recovered Covid patients may not be long-lasting, experts asserted that this points to the growing evidence that the infection could become endemic.
Sumi Sukanya Dutta
Virus Immunity Not Long Lasting: Study

Experts also said that the research findings imply that a vaccine, when available, may be required to be taken annually.

In the UK study, immune response of over 90 patients and healthcare workers showed that antibodies — which can destroy the virus — peaked about three weeks after the onset of symptoms and then dropped rather swiftly. While 60% of them had very potent antibody response at the height of infection, only 17% retained the same potency three months later. Also, antibody levels declined as much as 23-fold over the period. In some cases, there were no detectable antibodies at all.

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