First you have to look at the history of modern medicine - a good start is behold a pale horse by Milton Cooper (not william cooper).
Near the turn of the 20th century the Rockefellers tried, failed, and then succeeded at completely reshaping medicine into what we have now.
Worming animals and people was common knowledge right up until this point. The knowledge was often passed on maternally and kids were wormed as a matter of course, like people brush their teeth today (nonsensical habit that it is). It was all herbal right up until this point, for god knows how many thousands of years prior.
Was there an actually Conspiracy involving proliferation of worms, probably not at that particular point in time, but there was a Conspiracy of a for profit system.
With Lyme's disease, chemtrail fungal aluminum, and other bio engineered pathogens, anyone's guess is as good as mine. I wouldn't put it past the PTB, but I also wouldn't rush to any conclusions given the historical facts of worming being part of many different cultures.
I think it's just a big clusterf*** of greed and stupidity that has gone rampant. If people are raised properly, in a healthy womb, fed cleanly and properly and wormed from a young age, a lot of this would not be happening. So the conspiracy is just as much one of suppression of knowledge as anything else. A lot of life is who and what you believe.
We are also in a strange position of devolving through unnatural selection. We're close to 6 generations out now from the Rockefeller coup. Nature would have weeded out a lot of people who are otherwise still breeding.