What I did to train up my doctors before I could get enough tech points for for a level 2 Medicine was to create the potion which made the villagers sick (I think it's Rose+Orchid+Lotus) then had all of the villagers but one drink from it.
After the villagers were sick, I placed the one healthy one on the sick ones to have him/her heal them.
It's more in depth than just getting level 2 medicine, but it's a quick fix if you don't have enough tech points.