Source?
Where I first heard it...have to look up the others...
https://www.youtube.com/user/Campbellteaching/videos
14% in China: https://jamanetwork.com/journals/jama/fullarticle/2762130
10% in Italy: https://www.worldometers.info/coronavirus/#countries (”Serious/Critical” = on respirator)
Second source for 10% hospitalized/serious/intubated/ventilator in Italy: