Surprisingly enough, both my parents work in hospitals, and they recommend going to work while down with the flu - one would think that given the compromised immune systems more common in hospitals it wouldn't be, but no.
Have you considered the possibility that people can recommend actions they themselves do not follow? As your post is currently written, I see nothing surprising about their advice, insofar as they do not go to work with the flu or, as Karla suggested, they take certain precautions particular to working in a hospital.
Additionally, you seem to be using "cold" and "flu" interchangeably when they are typically quite different in severity, and, unlike a cold, the flu can be contagious for up to seven days after symptoms present (although one is still most contagious a day before symptoms present). For the sake of clarity - something you seem incapable of fostering - could you specify the exact nature of the illness in question?
If you indeed had the flu then it is far less acceptable to go to work.
Also, I would like to thank you for being petulant enough to rationalize all criticism towards your poorly constructed poll as trolling. My criticisms were on topic and are completely acceptable. The threats to ignore any dissenting voices was a nice, immature touch as well. Shine on my asexual friend, shine on.