I was thinking about parasites produce viral products theory.
Country areas in Canada (many on independent water systems) largely unaffected.
Inner city area's most affected.
What is the difference?

Upscale neighborhood homes have water filtration systems or bottled water .
Poorer people drink tap water.
Was the Q warning (stupid I know) to watch the water referring to contaminated supply?

Very easy to add parasite cysts to water after the treatment by accessing main lines.
Nursing homes easy targets. These people drink the water on table.
Easy to contaminate food and water. Undetectable.
No autopsies done.

Toxins produced by parasites may be what is showing up as positive tests.
What if the test swab contains parasite cysts?
Interesting possibility.

Is this why they bypass saliva area which has enzymes that may break down cyst coating?

Many kinds of disgusting things can live in us. https://www.medicalnewstoday.com/articles/220302 

If you are healthy and well nourished little to no side effects.
Old, weak, dehydrated and drugged, you will get very sick from the parasites depleting your conductive nutrients.

The treatment of hydroxychloriquine is coincidentally also used for malaria which is a mosquito bourne parasite.
Ivermectin and HCL.

Makes me wonder if #lymedisease is also a blood parasite.
No wonder antibiotics don't work.
First parasite should be killed then antibiotic to remove bacteria produced.