Researchers Create 3D Printed Vaccine Patches

“Vaccine target cells are much more common in our skin than in our muscle,” he said. “And that is due to the way we have evolved. You know, if you fall and cut yourself, the first line of defense to avoid infection is in the skin and those immune cells are the target of the vaccine. There are literally 100 to 1,000 times more per unit volume in skin than in muscle. “

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