Why are Sonakshi, Hrithik, Abhishek posting such pix?

On the occasion of World Thalassaemia Day, May 8, Bollywood stars spread awareness by posting their half black and white pictures with a message 'Did you know that when both, husband and wife, have Thalassemia Minor, there is a 25% chance that their child will have Thalassemia Major and will usually not live beyond 30 years?'

'Today, on #WorldThalassemiaDay, by posting this picture of half my face, I am supporting the #AadhiwaliZindagiMitao movement to remind everyone to get tested for Thalassemia and avoid giving their child half a life.'

'Visit www.thewishingfactory.org or call 844-844-9544 to schedule a Thalassemia test and to donate to help patients. Post a picture of your face cropped in half on Instagram and tag three others to do the same! @TheWishingFactory'.