If your children or pets are chewing on plastic and rubbery toys with formaldehyde, throw it out.
I learned something a bit late after 2 of my dogs died of the so-called 'cancer'. Formadehyde in the chew toys.
"Long term chronic exposure or short-term
exposure to high concentrations of formaldehyde
can lead to cancer. In animal studies, rats exposed to high level of formaldehyde in air developed nose cancer."
https://resources.perkinelmer.com/lab-solutions/resources/docs/APP__FormaldehydeInToysUVVis.pdf
Formaldehyde is also an ingredient in many vaccines...
https://learntherisk.org/vaccines/ingredients/
Do You Know What’s in a Vaccine? - Learn the Risk
Aluminum, Formaldehyde, MSG, E.Coli & More… As with all pharmaceutical products, it’s important to know what exactly you’re taking — or injecting. Vaccines are no exception. In fact, because vaccines are injected rather than taken orally, it even more important to know exactly what you’re puttin..
https://learntherisk.org/vaccines/ingredients/