What are Rare Diseases? The definition of a rare disease varies geographically. For example, in India, a disease is considered rare if it affects one in 5,000 people. In general, a rare disease is ...

Rare diseases - a medical condition so obscure that even your doctor has to Google. Despite their name, these diseases ...

A total lunar eclipse occurs when the Earth is positioned directly between the moon and sun, blocking the sun's rays from the ...