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Ultrasound can push vaccines into the body without needles
(www.newscientist.com)
This is a most excellent place for technology news and articles.
man a little vaccine needle is the least painful shot, i didn't even feel the last 5 i got until the next day
Yeahhhhhhhhh there is some value here
Signed,
A parent of two children under 5
Intramuscular always caused me soreness, except maybe once. I don’t know what that nurse did differently, I felt the needle sink in, and it hurt; but there was near-zero residual soreness.