"Innate local response and tissue recovery following application of high density microarray patches to human skin" https://www.nature.com/articles/s41598-020-7

"Innate local response and tissue recovery following application of high density microarray patches to human skin" https://www.nature.com/articles/s41598-020-75169-4 https://www.nature.com/articles/s41598-020-75169-4 That is a paper about the patch. It's an array of 3,000 micro-needles. The needles are coated with dry vaccine. The needles destroy many cells during application, which increases the body's immune response and uptake of the vaccine. The dry vaccines do not spoil as easily as the liquid ones. I recall seeing injections of dry medicine powder many years ago in rural West Africa. The nurse first used a sterile syringe to draw sterile water from a vial, injected it into a new medicine vial, withdrew the syringe, shook the vial and let it sit for a minute, and then drew the liquid medicine suspension and injected it into the patient. Are any injectable covid vaccines distributed as dry powder?