Not sure about the 70% but 60%-80% was talked about a few days ago: https://www.theguardian.com/world/2020/feb/11/coronavirus-expert-warns-infection-could-reach

Not sure about the 70% but 60%-80% was talked about a few days ago: https://www.theguardian.com/world/2020/feb/11/coronavirus-expert-warns-infection-could-reach-60-of-worlds-population https://www.theguardian.com/world/2020/feb/11/coronavirus-ex...