This is a dangerously misleading statement from a widely shared recent post. Those data were likely from the declining phase of the China outbreak, so will not reflect risk in the growth phase. More here: 
It should be pretty obvious those quoted risks are too low: if cases only infect 1% of their contacts during COVID-19 growth phase, R=2-3 would mean people are making 200-300 contacts on average while infectious. In reality, people generally have about 10-15 daily contacts.
The risk is also likely to be much higher in situations that involve close-knit interactions (in UK people have physical contact with about 5 people each day): thelancet.com/journals/lance…
