[M T]

I think the challenge is that I bet in Vietnam they had a pretty good compliance with tracking measures, whereas we know that when it has been tried in the US, the median F0 identifies only one contact.

If I read the numbers correctly for Santa Clara County, 43% of those who get a positive test identify NO close contacts.
We are still somewhat shutdown, but, really?

If that were correct, it is both good (that's why we don't spread as fast as elsewhere) and bad (how they heck did they get sick in the first place?)..

I might suspect the question is "Since you took your test, how many people have you spent more than 15 minutes with, withing 6 feet, and without a mask:?"   (Which would be a (IMO) stupid way to look for such information.  I hope that is NOT what they ask)

[M T]

I think the challenge is that I bet in Vietnam they had a pretty good compliance with tracking measures, whereas we know that when it has been tried in the US, the median F0 identifies only one contact.

If I read the numbers correctly for Santa Clara County, 43% of those who get a positive test identify NO close contacts.
We are still somewhat shutdown, but, really?

If that were correct, it is both good (that's why we don't spread as fast as elsewhere) and bad (how they heck did they get sick in the first place?)..

I might suspect the question is "Since you took your test, how many people have you spent more than 15 minutes with, withing 6 feet, and without a mask:?"   (Which would be a (IMO) stupid way to look for such information.  I hope that is NOT what they ask)