The New York Times

The COVID Vaccine We Need Now May Not Be a Shot

HYDERABAD, India — On the outskirts of this centuries-old Indian city, a world away from its congested roads and cacophony, the gleaming modern laboratories of Bharat Biotech are churning out a COVID vaccine that would be sprayed into the nose rather than injected into the blood. Currently available vaccines produce powerful, long-lasting immunity against severe illness, as several studies have recently shown. But their protection against infection from the coronavirus is transient, and can falt

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