hospitalization rates are being shared. IIRC, they are generally around 20% of confirmed cases, but the testing rate is low here so hard to know the true numbers
The testing rate is low almost everywhere. The mass testing done in the Italian town Vò suggests that 50-75% of infections are asymptomatic (but still contagious). This matches the findings from the cruise ship "Diamond Princess".
Also note that the populations of both the cruise ship and Vò skew quite a bit older than the world average, and younger people are more likely to be asymptomatic (AFAIK we still don't know how more likely)
