Ultrasound can push vaccines into the body without needles

Vaccinations could be made less painful by treating skin with a vaccine-laden liquid and using ultrasound to push it into the body

​Vaccinations could be made less painful by treating skin with a vaccine-laden liquid and using ultrasound to push it into the body Vaccinations could be made less painful by treating skin with a vaccine-laden liquid and using ultrasound to push it into the body