The humble egg, one of nature’s perfect foods, a self-packaged, relatively inexpensive source of protein that can serve as a lowly hangover remedy or help a souffle rise to heavenly heights, is also a great teacher. It’s helping Americans understand how a free-market economy works: When demand is high and supply is low, prices rise.

Anytime the virus is found on a poultry farm, the entire flock is slaughtered to help limit the virus' spread.

As egg prices continue to climb, some grocery stores in Massachusetts are limiting how many customers can buy.