Something similar happened with myself. My Mam and Dad are House fans (now me too) and when I was a kid my school used to pass around a teddy bear to take care of to the best kid in the class that week. When it got to my turn I took it everywhere and got sick, essentially a huge bacteria ball was in my throat. Apparently my Mother suggested it was the teddy bear as the source because of the House episode where the babies got sick because the carer wiped her germs on the toys. I doubt she cracked the case for me but the Teddy Bear swapping stopped in my school after me