Since March 25, when the bird flu virus was confirmed in U.S. cattle for the first time, weekly sales of raw cow’s milk have ticked up 21% to as much as 65% compared with the same periods a year ago, according to the market research firm NielsenIQ.
There have been major outbreaks around the world in the recent past, including four from 2014 to 2017, according to the Centers for Disease Control and Prevention.
So what makes this time different, and at what point should you be concerned?
Here are five things you should know about bird flu.
