It is a new Coronavirus that is believed to have originated in a bat in Wuhan, China. It causes the illness COVID-19. It has mutated at least 2 times (honestly, evidence shows many, many more) and is now causing a pandemic. It is believed to have a mortality of between 1-3%, but this could be lower, because we aren’t testing enough mild cases. Either way, it is causing lots and lots of people to die and will cause people to die unnecessarily if we don’t do our parts to continue to slow the spread.
Covid-19 is the illness caused by Sars-CoV-2, as discussed above.