The woman from Daegu who it is unknown how she contracted the coronavirus has now being called a “superspreader” because of how she likely infected 18 other people at her church:

South Korea confirmed 20 more cases of the novel coronavirus Wednesday, bringing the total number of infections here to 51, with most new patients traced to church services, stoking concerns that the country may identify more virus patients despite tighter quarantine measures.
According to the Korea Centers for Disease Control and Prevention (KCDC), 18 of the new patients are in Daegu, 300 kilometers southeast of Seoul, and in the adjacent North Gyeongsang region.
The country’s 31st patient, probably a coronavirus “super spreader,” is believed to have infected at least 15 others and came in contact with 166 people. The 61-year-old woman, a Daegu resident, started to complain of a fever on Feb. 10 and was confirmed to be infected Tuesday.
A preliminary epidemiological investigation shows that the potential super spreader attended several of the same church services as the other newly confirmed patients and had direct contact with one person at a Daegu hospital.
Yonhap
You can read more at the link, but this lady for Daegu has been using mass transportation in the days before the symptoms of coronavirus began to show. If people in her church became infected it seems people in mass transit with her could get infected as well.
I think one thing that will come out of this is that church attendance across the country will drop.







