I think this doctor's mask from the Great Bubonic Plague captures how scary the Corona Virus may seem to some people. My wife had to cancel an appointment for her back pains with a neurosurgeon who practices in Philadelphia. It was not worth the risk travelling to a large city hospital. The receptionist said they had many cancellations. In some ways the Corona Virus Epidemic reminds me of the Bubonic Plague. Here's some information I found on the web: Wikipedia: The Black Death , also known as the Pestilence , Great Bubonic Plague , the Great Plague or the Plague , or less commonly the Black Plague , was one of the most devastating pandemics in human history resulting in the deaths of an estimated 75 to 200 million people in Eurasia , peaking in Europe from 1347 to 1351. [1] [2] [3] The bacterium Yersinia pestis , This was a bacteria. Today's Corona is a virus which can be just as deadly . Virus: Invading you to stay alive. Here is a good