Jaklenec and Langer Lab technologies can administer multiple vaccine doses with a single injection, eliminating the need for follow-up boosters. This is crucial in developing countries where up to 35% of children receive incomplete vaccinations.

Pictured is a dissolvable needle (blue) designed to deliver two mRNA vaccine doses: the first dose (pink) releases from the needle tip upon administration, and the second (gold) is encapsulated in a slow-degrading polymer and released one month later for programmed vaccine delivery.