And while I'm young and generally in shape, I'm no professional athlete and even I can occasionally get over it 48 hours. Not to mention Kesler had the flu a week ago (and take note, he played a couple days later) so it's not that hard to figure out how Schneider got it..
TBH i'm not sure you are. You have probably not had influenza if you have gotten over it in 48 hours. Influenza recovery times are generally 1-2 weeks for a fit, healthy person. "The flu" in common vernacular typically means a Rhinovirus (common cold), which does have a recovery time of 48-72 hours. Influenza is actually (relatively) rare - for example the incidence rate in Canada last season was less than .03% of the population (~12,000/34,000,000); compare that to a common cold which people can (and typically do) get multiple times a year.
I wouldn't be too concerned with bieksa coming back to vancouver. It's the last game of the 5 game trip and if they thought he wouldn't play tomorrow, why would they just keep him around? Might as well just send him home early to rest and recoup.