[magnus]

Contrary to reports of transmission by asymptomatic or presymptomatic carriers, by testing and isolating, there was no household transmission by asymptomatic cases.

Note, there were only 4 truly asymptomatic cases (which is a different striking observation) so it's not too surprising that you might not get a single household transmission.  (the transmission rate for symptomatic was apparently 16.2%). 

Then again, I believe there were 4 that were presymptomatic, so that would be 8 total without symptoms at time of test.  So a little more surprising, but only about 1.5 infections away from hitting the average.

[magnus]

Contrary to reports of transmission by asymptomatic or presymptomatic carriers, by testing and isolating, there was no household transmission by asymptomatic cases.

Note, there were only 4 truly asymptomatic cases (which is a different striking observation) so it's not too surprising that you might not get a single household transmission.  (the transmission rate for symptomatic was apparently 16.2%). 

Then again, I believe there were 4 that were presymptomatic, so that would be 8 total without symptoms at time of test.  So a little more surprising, but only about 1.5 infections away from hitting the average.