I have gone several rounds with the worms. The first time I passed hundreds and felt better than I had felt in 20 years. I stopped treating myself, and they came back. The second time it took longer, 7 months as opposed to 2.5 months the first time. But again, I was so healthy, no stomach issues at all, my hair even lost it's premature gray.
Now, I think the parasites are under control, but I have another issue, not sure if it is damage due to the previous infections or not, I'm going through testing now.
The thing is, I would have been totally cured and back to normal life if I had not stopped 2 yrs ago, but had circumstances and had to put cleansing on hold. That is why I keep telling people not to stop, even after you feel they are gone.
They live in cycles. If you are talking about worms....you kill some, and they repopulate as quick as you kill them. Some scatter to other organs. Then there is the lung phase which is part of their lifecycle. Even if you manage to kill every one in the gut at once, there is another batch in the lungs on the way to the intestines. There have been reports of live larvae in the bodies of the female worms, so you kill her, they are released in the system. This goes against what medical Science has written, but so does most of the real life cases on this forum.
So the days of the 14-21-30 day cleanses are over. Keep cleansing for years. Once you are better, you can take a break, but get right back at it. It gets easier every time cause there are less to kill. But harder in a way, cause the ones that survived the initial kill are stronger and resistant to what killed their ancestors, I guess due to evolution.