Nice article, although I can't say I agree with the idea of "encouraging" sick people to continue working whilst at home. If you're going to be sick, do it properly. Put your feet up and get better quickly, rather than soldier on and drag it out.
That said, every office I've worked in has at least one sickness martyr who thinks they're doing the business a huge favour by coming in even when they clearly should have stayed at home, merrily spraying their infectious droplets over all and sundry, completely oblivious to the Paddington-Bear stares they get from their soon-to-be-infected colleagues.