It's an effort to raise awareness of ALS where participants must dump a bucket of ice cold water and then dare someone to do the same. If they can't, the alternative is to donate $100 to the ALS association.
Amyotrophic lateral sclerosis is also referred to as Lou Gehrig's Disease. It is a progressive neurodegenerative disease that affects nerve cells in the brain and the spinal cord
The ice bucket challenge went viral on social media after a US baseball player and ALS patient, Pete Frates, floated the idea of the challenge in a video on a social networking site. He got the idea from a friend
More than 1.2 million videos were shared on Facebook between June 1 and August 13. The challenge was mentioned more than 2.2 million times on Twitter since July 29, after Frates' appeal
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