Rare diseases Effects not so rare

To most people, the word 'disease' refers to infectious diseases like typhoid, cholera etc. But how many of us regularly hear about diseases like Down's Syndrome? Probably a few - the ones who keep track of the medicinal world. So why are such diseases mostly unheard of? Because they are classified as rare diseases. Most of these rare diseases are ones about which we have little or no knowledge. As it happens, 29th February, the rarest of days in the annual calendar, is also the day when such...