[mothered]

Can't watch the video right now, but maybe drying is only intended as a mean to make it easier to transport and store for longer times without degradation before usage (then it makes sense to state that water is what destroys the vaccine), but in the end it needs to be diluted and turned back to a solution for injection as usual

You've made a valid point.

To completely exclude water, perhaps manufactured In tablet form, whereby It dissolves when swallowed will keep Its effectiveness Intact.
Here's an Interesting article that supports my comment:

https://www.healthline.com/health-news/t...-be-a-pill