I have all of the EPs, which includes Seasons, of course. I know that Sims can get allergies, and I even had a pop-up from the weatherman on TV saying, "Gee, allergies are bad!" or something to that effect.
The weird problem I'm having is a randomly sneezing male Sim that isn't really there. It's none of the Sims I'm playing, and it's not a randomly passing Sim. I've been watching them all very carefully, and it's just happened again at 3:00 a.m. and all were on the screen. I heard the male sneezing again, but none of them were doing it. The TV was not on, there were no random Sims passing by. No one is sick.
I am in spring right now, but I seem to recall the same issue during winter.
Since I'm doing a challenge, I really don't want to move the family off the lot and back. The sneezing isn't causing any problems other than annoying me while I try to discover the source.
I typed in "Sims2 (Sims 2) allergies, sneezing" under Google, and nothing like this has come up. Anyone else have had this problem in the past? I should be out of spring soon, and it will be interesting to see if it continues or not.
ETA: It seems to have stopped now that it's summer. However, I'm still curious about the mysterious 'invisible' sneezing. I've seen my Sims sneeze in the past, so why wouldn't they now?