In that study, Table 2:
R0 for pre-symptomatic infections is 0.9 or 46% of all new infections.
Infections from a symptomatic persons happen with an R0 of 0.8 which is equal to 40% of all new infections.
Environmental infections have an R0 of 0.2 or 10% of all new infections.
Infections from asymptomatic cases have an R0 of 0.1 or 4% of all new infections.
I am sure there is a lot to learn about this virus, and I fully respect that those in the front line day in, day out, often have the clearest picture.