Needle-Free Flu Vaccine Patch Works as Well As a Shot

A press-on patch that delivers flu vaccine painlessly worked as well as an old-fashioned flu shot with no serious side-effects, researchers reported Tuesday.

People who tried out the patch said it was not difficult or painful to use, and tests of their blood suggested the vaccine it delivers created about the same immune response as a regular flu shot, the team reported in the Lancet medical journal.

Image: Microneedle influenza vaccine

This close-up image shows a microneedle array containing influenza vaccine.