Key language: 1.2% OF THE PATIENTS. Most infected people who are asymptomatic ARE PROBABLY NOT PATIENTS, so asymptomatic infections are probably being undercounted.
Yup!
True that !
That "1.2% OF THE PATIENTS" implies that they were seen by a healthcare professional,
and remain undetected as carriers.
Those who are asymptomatic continue to remain in the general population, infecting others.
The situation is further complicated by problems with the testing kits
giving false negative results, according to one recent article,
as high as 70% false reports.
I can appreciate tracking serial contagion running in families,
however, when dealing with asymptomatic virus carriers, trackers would run into a 'dead end'.
At that point, I imagine control and tracking to be very frustrating to researchers.