danger of infection, boy and his dog with medical masks

adorable air allergy animal boy breed canine care clean contagion contagious corona covid cute danger defense doctor dog doggy dust environment face fawn fear filter flu friend funny germ germs health ill illness immune immunity infection little looking mask medical medicine mixed moggy mongrel mouth nose pet pooch prevention protection protective pup puppy safe safety security shield sick sickness snout surgical teen teenage teenager toy train training transmission vet veterinary virus wearing