(NEXSTAR) – The map of flu activity across the United States continues to darken ... Massachusetts, Michigan, Minnesota, ...

“Our best defense to protect ourselves, our loved ones and all those around us is a simple shot,” Dr. Bruce A. Scott, president of the American Medical Association, said in a recent statement.

The Mississippi River is a giant river that provides abundant resources. But, how big is it, exactly? This animated map shows the scale of the Mississippi River and its drainage system in perspective.