Dr. Kavita Rao is a fictional character, a geneticist in the Marvel Comics universe of the X-Men. She first appeared and featured prominently in the first story arc of the monthly series Astonishing X-Men in 2004.
Dr. Kavita Rao is a world-renowned geneticist from India who developed a serum (later called "Hope") which could "cure" mutants, turning them into normal humans. She explains that she regards the mutant gene as a 'corruption' of healthy tissue, and justifies her research by looking at mutants who committed suicide or hurt others because of their powers, such as a female mutant with a butterfly-like appearance or Tildie Soames (a child whose nightmares can manifest into monsters).
Hundreds of mutants immediately signed up for the procedure at Benetech (the corporate backer of her research). The X-Men debated the merits of the cure and the significance of labelling the mutant condition a disease. The chance at shedding his "beastly" appearance and avoiding any further secondary mutations held significant appeal for Hank McCoy (aka Beast) and he considered taking the serum for a time, although Wolverine objected by saying that an X-Man taking the serum would be the equivalent of admitting that there was something to 'cure' in the first place.
It was later revealed that Rao had been working for the alien Ord of the Breakworld, who also had in his custody Colossus (who was, at that time, thought to be dead, but had been resurrected by Ord's technology). The X-Men defeated Ord and Benetech, and Ord was delivered into the hands of S.H.I.E.L.D.. Dr. Rao's work was destroyed by Wolverine, leaving Hank with the last sample of "Hope", although he remains uncertain whether or not he will use it at some point.
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