Many unlinked cases are likely maids who caught virus from their Bangla boyfriends

[A Singaporean]

The maids will then spread unknownly to the families.

 

[zhihau]

Sama sama as those who visited Wuhan hooker, also label as unlinked case.

Doubt the domestic helpers would reveal that they were in close contact with the foreign workers.

 

[Leongsam]

It's impossible to link everything because of the huge numbers of asymptomatic cases amongst the population.

"At least 50% are asymptomatic" has appeared in data from all over the world. It seems that the majority simply get rid of the virus without ever coming down sick.