A needle-free COVID vaccine approved for India, China.
virus and was tested as a booster on people who had received COVID shots from another Chinese company.The interest in a shot-free vaccine is part of a strategy to improve protection against infection by placing the doses directly where the virus enters the body, such as in the nose or mouth.
In some low-income countries, using something other than a shot may also be easier for storage and delivery, Dr. Michael Diamond from Washington University told theNearly a dozen options are being tested globally, theThe immune system has specialized tools to protect different sites of the body in different ways, Ashley St. John, an immunologist at Duke-NUS Medical School in Singapore, told theAdvantages for a mouth spray vary depending on the size of the droplets, Dr.
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