TECHNOLOGY.ORG publishes article "Jet-spray Pill Could Make Vaccinations Needle-free"

“Researchers at the University of California, Berkeley have developed the MucoJet, a pill that blasts vaccines through the inside of the cheek without pain. The pill is a a 15 mm cylinder with a 7 mm-wide bulb on the end, and using it is a little like cracking a glowstick. A patient squeezes gently on the bulb to break a thin membrane separating two compartments: one filled with water and the other, a dry chemical propellant composed of citric acid and baking soda. After mix its fizzes up generating enough pressure to push on a piston in the cylinder, which forces a small reservoir of the vaccine out the other end through a small nozzle.”