That statement seems to be very obsolete. It claims "doctors and scientists are working to estimate the mortality rate". Well, that work has been done and the results were that you can find IFRs of anywhere between 0% and 1.6%, with a median of about 0.2%:

https://www.who.int/bulletin/online_first/BLT.20.265892.pdf

There's a letter here in the BMJ that states it's comparable to flu:

https://www.bmj.com/content/371/bmj.m4509/rr

The nature of IFR calculations means there will likely always be very wide uncertainty intervals, however.