The surprise on 3-year-old Grayson Clamp's face in the video is priceless. His mouth opens wide as he points to the person in front of him speaking.
It was the first time Grayson had heard sound. He was born without a cochlear nerve, which connects the brain stem to audio waves in the outside world. His parents had him fitted for a cochlear implant at a young age, but the device didn't help.
CNN's Dr. Sanjay Gupta says the biggest concern about Sarah Murnaghan's recovery is whether her body will reject her new lungs. The 10-year-old, who has cystic fibrosis, is recovering tonight after a six-hour surgery. Her parents fought so she could be eligible for priority on an adult organ list; the lungs she received were donated by an adult.
Three years after his diagnosis, actor Michael Douglas told The Guardian that his throat cancer may have been caused by the human papillomavirus contracted through oral sex. His statement put the spotlight on a larger public health issue.
Smoking and drinking are also significant risk factors for throat cancer. CNN's Chief Medical Correspondent Dr. Sanjay Gupta explains that doctors can test to determine if there's a direct link between HPV and cancer.
"What they're searching for is DNA of the virus ... and if they find it, then they can almost definitively say that this was caused by the HPV infection."
HPV is thought to cause 1,700 oropharyngeal, or throat, cancers in women and 6,700 oropharyngeal cancers in men each year, according to the CDC.
CNN's Dr. Sanjay Gupta gets exclusive access to homes and buildings damaged by a fertilizer plant explosion in West, Texas. The wreckage indicates how significant the blast was for the residents and structures near the explosion site.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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