Only my thoughts an I haven't checked this link out yet.
I've thought for years that we over vaccinate....or are encouraged to do so. I also think there is too much "pressure" from vets and advertising to spray, drop, inject, heaven knows what onto and into our animals to control parasites...that they might not even have.
I understand we all live in diffferent situations and some owners DO need to vaccinate by law, or really must use flea/lice control etc.
I go for natural remedies and care whenever I can

But each owner must do what they think is best.
Barbara x