Start of school cold

During the first week of school it is a tradition that everybody brings the exotic germs from where ever they have been and like a pot luck you share them.. The result is little cold for everyone.. Except for the one who had the toughest and meanest cold that gave its bearer immunity to all other germs..
I got it, Halle got it, our friends got it... everybody have their theories how they got it... but they did... Hopefully I had a "vintage" cold that will protect me through the winter...

Pekka