New Delhi: The Covid-19 vaccines made by Pfizer-BioNTech and Moderna trigger a persistent immune reaction in the body that may protect against the vir

Pfizer and Moderna vaccines likely to produce long-lasting immunity, study finds

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2021-06-30 07:30:04

New Delhi: The Covid-19 vaccines made by Pfizer-BioNTech and Moderna trigger a persistent immune reaction in the body that may protect against the virus for years, scientists reported Monday.

They also found evidence that most people immunised with the mRNA vaccines, such as Pfizer and Moderna, may not require booster shots, until or unless the virus and its variants do not evolve much beyond their current forms, which does not seem to be the scenario so far.

The findings, published in the journal Nature, further noted that people who recovered from Covid-19 before being vaccinated may not need boosters even if the virus does evolve and make a significant transformation.

“It’s a good sign for how durable our immunity is from this vaccine,” Ali Ellebedy, an immunologist at Washington University in St. Louis, who led the study, said.

The study, however, did not examine the vaccines made by Johnson & Johnson, a viral vector Covid-19 vaccine, which is said to have produced a less lasting immune response than mRNA vaccines.