The Defense Advanced Research Projects Agency is funding the development of technology to package oral vaccines for delivery using pollen. The exterior of pollen grains are shells made of a non-allergenic, naturally durable polymer. The interior of the shell can be emptied, which eliminates any allergy-producing material, and then filled with vaccine, according to GlobalBiodefense.com. The shell’s durability also gives it a substantial advantage over traditional oral tablets because it serves to protect the vaccine while it is in the body. Stomach acids, for example, often limit a medication’s absorption. A pollen shell would protect the vaccine until it reaches...