Latest debate: How long does immunity against COVID-19 last after vaccination?

www.thehindu.com
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fairly difficult
Health agencies in some parts of the world are considering a booster dose against fading immunity, particularly among the elderly
How long does immunity against COVID-19 last after vaccination? Does one need a booster dose?

Reports of health agencies in parts of the world considering a booster dose against fading immunity, particularly among the elderly, even after two doses of vaccine, has raised the uncomfortable question in India, which is struggling to vaccinate its vast population.

Though breakthrough infections – people testing positive for COVID-19 even after vaccination – have been reported in Karnataka, Dr. Mudassir Azeez Khan, Head of Community Medicine at Mysore Medical College and Research Institute (MMC&RI), in a presentation at a recent meeting of the newly constituted Mysuru District Technical Experts Committee on COVID-19, argued against the need for a booster dose.

"A breakthrough infection itself will act like a booster dose. A human body produces better antibody response against COVID-19 through natural infection than a third dose of vaccination," he said.

Elaborating, Dr. Khan said SARS-COV-2, the virus strain causing COVID-19, has a total of 28 different proteins. "The antibodies generated from the vaccination will act only against the…
Laiqh A. Khan
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