Does alcohol cause cancer? Will warning labels be updated? And more questions, answered.

U.S. Surgeon General Dr. Vivek Murthy is calling for cancer risk warnings to be included on alcoholic beverages, prompting questions about the health impacts of alcohol and whether updated labels will be seen on shelves.

"Alcohol is a well-established, preventable cause of cancer responsible for about 100,000 cases of cancer and 20,000 cancer deaths annually in the United States - greater than the 13,500 alcohol-associated traffic crash fatalities per year in the U.S. - yet the majority of Americans are unaware of this risk," Murthy said in a news release Friday.