Best defense against Corona - or any -virus: Wash your hands

At some point, most people have experienced sniffling, aching, coughing, stuffy head and fever associated with the human coronavirus.

But symptoms of the common cold differ from COVID-19, a new or novel disease not previously seen in humans.

Here's what is known, according to Dr. Michael Mina, assistant professor of epidemiology at Harvard Medical School:

• COVID-19 first appeared in Wuhan, China, on Dec. 8, 2019;

• Officials assumed the virus was caused by zoonotic - animal to human - transmission; and

• Researchers identified the genome sequence of the virus within a month.

Symptoms of COVID...