Updated Jan 23, 2021 | 14:13 IST
Early reports indicated that such antibodies decline substantially over less than six months. This raised questions about how long protective immunity might last following an infection. COVID-19: Is natural immunity better than vaccine-acquired immunity?  |  Photo Credit: iStock Images
New Delhi: During the early days of the COVID-19 pandemic, it was unclear whether and how individuals and populations would develop protective and lasting immunity against SARS-CoV-2, the novel coronavirus that causes COVID-19 disease. People lived in a limbo of whether they would gain immunity after infection or vaccination. Therefore, the initial focus was on understanding and defining virus neutralising antibodies from B cells after infection. Early reports indicated that such antibodies decline substantially over less than six months. This raised questions about how long protective immunity might last following an infection.
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Coronavirus: Is reinfection a reality? Who has a higher risk of reinfection? Doctors explain
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