Why so many humaworm rounds?

Hi,

I'm trying to persuade a friend to take humaworm for them and their whole family. My friend asked why it took so many rounds to cleanse the parasites? Why not just one round? Why can't just one round get rid of all the parasites?
I'm not too sure of the answer- but would really like it if Dr Bailey and other reply as I think taking humaworm would really benefit this family. The symptoms some members in this family have are: chronic fatigue, frequent horrible migraines, and a weak stomach.



Kind regards,
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