Chris Rock's joke about Jada Pinkett Smith's baldness during the Academy Awards made her husband, Will Smith, lose his cool as he slapped Rock. The incident soon broke the internet and become part of the meme culture. For the uninitiated, Jada Pinkett Smith has been struggling with an autoimmune disease called alopecia areata. But, what is alopecia? and, what are its symptoms and treatments? In this episode of 2 Took Baat, Megha Mamgain is explaining everything that you need to know about alopecia.