//Coronavirus has been with us for a year. Here's what we still don't know

Coronavirus has been with us for a year. Here's what we still don't know

Video above: Some Winter-Related Symptoms That May Be Confused With COVID-19When China first reported cases of coronavirus to the World Health Organization on Dec. 31, 2019, it was described as a mysterious new strain of pneumonia. It didn’t even have a name.Within two weeks, Chinese scientists had identified the virus’ genome sequence, the genetic code that makes up the virus. Within three weeks, the first