I had a sinus infect last mth, now i'm just getting over mine but now my husband has it. could i have given it to him? could it b our house? the season? i never had allergies but my husband does.

Sinus infection: Infectious sinusitis is could be contagious especially when one sneezes or coughs, though usually not as contagious as a cough or sore throat. . Alternatively could be seasonal allergies and may be sinusitis on top of seasonal allergies especially if a history of allergies.and now it is spring Would not implicate the house unless ther are 3-4 episodes of 2-3 months, Follow up with doc/urgent care

Virus vs bacteria: Bacterial sinus infections are often a complication of a cold which is of course very contagious. This usually can't be diagnosed until a good 10 days have gone by. Allergies may add to the risk but the actual bacteria that cause sinus infections are typically normal residents in the nasal passages that then get a foot hold in the sinuses.

All of the above.: Technically speaking, you could have given it to him, but I think that incubation period is a bit long. Could be the house if there are allergens present. Could be the season. Could be a co-worker or other acquaintance who just happened to cough in his genera direction. Could have been someone on a morning commute, or on a train or bus.