Parvo is shed through poop. So the only way one would have to worry is if a puppy with parvo pooped on said toy and then it was purchased. A dog gets parvo by smelling poop or even smelling/licking poop off a persons shoe that walked in a pile of poop from a dog with parvo.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD