The Rife machines are supposed to be able to handle the bugs. So far I have had to rely on the oral consumption of the bug killer to keep them at bay.
Kids respond best to a good adjustment. I built my practice getting rid of kids ear infections and sinus conditions. Put the local pediatrician out of business.
Some "runny nose" can be expected as a child grows. That's the immune system working. As long as it doesn't develop into a full blown sinus infection or ear infection don't be that concerned about it. It'll pass and the child will have acquired more immunity.
The Rife machines are supposed to be pretty good. I don't have that much experience with them and what I have seen I wasn't very impressed with. Plus it IS electronics which I tend to shy away from when applied to the human body.
But kids sinus and ear infections? Yeah, good ole chiropractic adjustments seem to work better than anything else.