He felt it was more important to treat only if this need arised. For instance, if one suddenly found themselves in an epidemic area where small-pox was rampant, Variolinum, or other nosodes, such as Malandrinum or Vaccinum could be taken as either a preventative, or as a treatment for individuals already infected. Complete eradication of any specific disease is unlikely to happen. There may be diseases we don't see much of anymore, but, you can be sure that they are still out there, somewhere, waiting to make their move. What does tend to happen is that over time the microorganism will mutate, to protect itself from becoming extinct.
Microbes are very adept at surviving.
They have been here since the beginning of time. It is unlikely that any microorganisms are just going to give up and die because we attack them with drugs and vaccinations. When they mutate, they often become stronger and more deadly than they were in the first place. Microbes will often mutate to the point that they are resistant to our allopathic drugs, and, as the allopathic medical community is discovering, this may result in a whole army of untreatable and incurable diseases. In essence, the entire planet's vital force is out of balance.