No, veterinarians do not know what’s in animal vaccines. And yes, standard flea and tick medicines do penetrate pets’ skin, and can be excreted back onto the very humans who pet them. This and more from Dr. Marcie Fallek, a veterinarian who shares how to stop poisoning our pets and, by extension, ourselves and our children. Source: https://x.com/childrenshd/status/1848505181035761897