Reinholdt does the only sensible thing to do. And that's ask around for information on Snozzbery Bushes and Love-In-Idleness plants.

Also hires a guide willing to take them into the forest to find said plants.

If necessary, uses his newfound Life abilities to cure some of those diseases in order to get said guide and information if there are any elves in the human settlement that could use it. I believe he can handle all except the zombie-ism in terms of curing the recent afflictions. At least I believe he can do that anyways.

Reinholdt then hires a second guide because if one dies horribly he wants a backup. Cause they're Red Shirts.