'Man flu' (not to be confused with woman flu, nor the much less serious actual flu) is the single most fatal illness in the known universe. It is estimated that every year 482 million men die from this disease, making it more devastating than such great illnesses as the Black Death and the Black Death II. There is only one species known to man that is immune to the devastating man flu; Women. It is for this reason that many cynical women are unable to comprehend the sheer enormity of suffering induced by man flu, having only suffered their puny woman flu.