I don't think it's a silly question! I recently went through a long bout of pneumonia with some other complications and was really sick. I didn't give or get any Yorkie kisses for a few weeks and I was constantly washing my hands and using anti-bacterial gel before I would touch my babies. I was real paranoid about getting them sick. I don't know if I could have or not, but I didn't chance it. I felt bad about keeping them from getting too close, but boy was it great when we started kissing again, lol
I think it would be a good question to ask your vet, also might depend on how sick you are, and how healthy your Yorkie is. JMHO