I was told by vets that dogs can get viruses just like us. The only difference is they get different ones than we do. Hope he is feeling better! About the only illness that can pass between dogs and people is strep. My aunt is a yorkie breeder and she had to have 6 dogs and 4 kids all treated with antibiotics at the same time for strep. It just would not go away until they ALL took medicine. (You can't really tell if a dog has strep, the vet has to test them.)