I'm sure they tried Homeopathic treatment for the plague as well didn't do them much good either, I believe they tried to ward off the disease by carrying an orange with cloves in it & pomanders as well, if there is a natural remedy I'm sure the indigenous people of the affected areas would have found it as it's been around for as long as they have relied on the local game to live on way before it was being smuggled into other countries, the Monkey & other game are well known carriers of numerous diseases that can & are transmitted to humans, but especially the apes!.i'm afraid Genetic similarities are not the only thing we share.