The actual term Expiration Date refers to the last date a food should be eaten or used. Last means last -- proceed at your own risk. Other, more commonly spotted terms are:  1 Sell by date. 2  The labeling sell by tells the store how long to display the product for sale. 3  You should buy the product before the date expires. 4  This is basically a guide for the retailer, so the store knows when to pull the item.
When an animal or person is infected with Yersinia pestis, the bacteria affect the lymph system, causing the characteristic symptoms. If bubonic plague is left untreated, plague bacteria can quickly multiply in the bloodstream, causing septicemic plague. The bacteria could also progress to the lungs, causing pneumonic plague.
Confidence votes 94.7K. The Bubonic Plague originated in China. It was spread by the fleas carried by rats going aboard ships and they were transported to Italy, Greece and France, when the rats left the ships entering cities and gave us the Bubonic Plague.he Bubonic Plague spread from China and East Asia to Europe through the Silk Road and arrived in the Ukraine. It also spread from fleas upon rats aboard merchant ships, and i â¦ s believed to have spread from Sicily.