It is 2% dead if you assume that all today infected will recover in the end. It is much more pessimistic when you do not have such assumption but project current dead to number of infected about 2-3 weeks ago.
Your probably both right 10% if you get put in a big room on a bed with just basic med care and 2% with the best hospital care we are currently able to provide (antiviral pumped oxygen ect).