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Inhaled Vaccines Aim to Fight Coronavirus at Its Point of Attack

Vaccines sprayed into the nose or inhaled through the mouth won’t require needles and could be easier to roll out. They may be more effective too.

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The Covid-19 vaccines closest to the finish line are designed to be injected into the arm. Researchers are looking at whether they can get better protection from inoculations that fight the virus at its point of attack — the nose and mouth.