Apply a known safe encapsulation process to one of the vaccines that works and make it shelf-stable. That's worth a billion.
Some of the vaccines are a fragile messenger RNA molecule with nothing to protect it. That's good, because it's the minimal molecule that will do the job, reducing the risk of side effects. But it has to be kept frozen at dry ice temperatures before use. The "user friendly" version needs to follow.
See [1][2] for other vaccines for which this has been done.
