Page 18 - உணர்ச்சி பல்கலைக்கழகம் இல் அட்லாண்டா News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Carl Zimmer, Apoorva Mandavilli and Sharon LaFranier, The New York Times Published: 29 Jul 2021 12:28 PM BdST Updated: 29 Jul 2021 12:28 PM BdST A student receives a second dose of the Pfizer vaccine at the Morris Heights Health Center in the Bronx on Tuesday, July 27, 2021. The Pfizer-BioNTech vaccine’s effectiveness wanes slightly over time, according to newly released data from the companies, but remains strong in preventing severe disease. (James Estrin/The New York Times) Pfizer reported on Wednesday that the power of its two-dose COVID vaccine wanes slightly over time, but nonetheless offers lasting and robust protection against serious disease. The company suggested that a third shot could improve immunity, but whether boosters will be widely needed is far from settled, the subject of heated debate among scientists.

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