Good question - - - - what is the answer?????? We are currently finishing up after 3 months and scaired stiff they're not all gone and more will come . . . .

Yes and no. parasite cleansing should be done 2-3 times per year - every year. The very first cleanse will remove the old, established infections and the ones there after will remove any new infections and will help to prevent getiing new infections.

Regular parasite cleansing will keep the parasites from "taking over" - in other words, if you should happen to pick up a parasite infection - the parasites will simply not have enough TIME to reproduce enough to cause major harm. Even if you pick up an infection - the next scheduled cleanse will get rid of it very quickly :)

It is important to give your body the nutrients it needs so your immune system will be strong enough to fight off parasite attacks, and worm yourself regularly. Be sure you are getting enough minerals, especially iodine. You may need some B Vitamins. Etc Etc.
Eat lots of raw whole organic food, raw food is especially important in the summer. Mix raw and cooked vegetables in the winter. Yes, they will be lurking and waiting to come back until the collective consciousness of the planet is vibrating at a frequency they cannot withstand. Then they will disappear. I hope. Optimist here.