This article discusses an upcoming implementation of a "health forecast" system. The idea would be to forecast the incidence of certain ilness after for example temperature drops or raises dramatically. Since I am always affected when that happens (specially when the temperature drops quickly at night and I have the windows open) I know that this is a real problem.

What we really need however, is some device to tell us what to do to avoid getting a cold for example based on the evolution of the climate and our own propensities. I'll have to keep waiting for that one, though.