Here's why:
* Parvovirus is spread through direct contact with infected feces. The virus doesn't survive long on surfaces like clothing.
* Indirect contact is possible but unlikely. Parvovirus can survive on contaminated surfaces for a short period, but it's easily killed by common disinfectants.
* Washing your hands thoroughly after contact with any dog is the best way to prevent spreading any diseases, including parvo.
However, it's crucial to be cautious and keep your puppy away from any sick dogs. If you suspect a dog you have touched might have parvo, it's best to consult with a veterinarian. They can advise you on the best way to protect your puppy.