@Builder,
Quote: Formaldehyde is typically present in the human body and is a product of healthy digestive function.Mar 14, 2018
The human body produces up to an ounce and a half of Formaldehyde a day and eliminates it each day.
Most people cannot get enough natural occurring Formaldehyde in a day to get a deleterious effect because the body is very efficient at getting rid of it.
https://formaldehyde.americanchemistry.com/Formaldehyde-Occurs-Naturally-and-Is-All-Around-Us.pdf
This does not mean it we can't be poisened by it. It would also seem because the body is so good at removing it, it would have a poor chance of having any sort of anti viral properties.
Secondly, just because the body handles Formaldehyde so well doesn't mean it'll handle any other disinfectant as well. Formaldehyde isn't Clorox or any other disinfectant.
You can be poisoned by it and it IS serious:
https://healthhearty.com/formaldehyde-poisoning-symptoms