Vaccines can be delivered through the skin using ultrasound. This method doesn’t damage the skin and eliminates the need for painful needles. To create a needle-free vaccine, Darcy Dunn-Lawless at the University of Oxford and his colleagues mixed vaccine molecules with tiny, cup-shaped proteins. They then applied liquid mixture to the skin of mice and exposed it to ultrasound – like that used for sonograms – for about a minute and a half.
I heard an ad for people scared of dentists - they were offering to put people under.
[More] dangerous and expensive, but better than skipping it altogether.
Gotta be a market for hyper-hypodermic-phobic folks. Even if you & I stick with the five second jab.