So, I don't think this is a valid comparison. There was great uncertainty during spring and early summer 09, but I don't remember 10% being considered seriously. For individual-level severity, all the signs are that this is much more severe than 09 flu.https://www.reuters.com/article/us-china-health-deaths-idUSKBN1ZZ1AH …
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CFR estimates as reported deaths/reported cases is meaningless. Deaths occur weeks after cases. Under-ascertainment of infections is also an issue, as article points out - but so far there are only limited anecdotal case reports and limited data from travellers.
Also see here for our preliminary estimate of CFR based on cases outside China (including right-censoring):https://github.com/calthaus/ncov-cfr …
