Singapore cases are rising, but primarily within a specific sector of the community (foreign worker dorms, which were always a concern as they're very communal spaces). We've been in a de facto lockdown for a week now, so the next few days will be telling.

Hong Kong, for its part, reported only 4 new cases on Sunday and has been testing aggressively - I think they're around 15,000 tests per million people now.

Yeah, local non-imported cases in Singapore look like they've been increasing exponentially since at least the start of March, as does the number of cases completely unlinked to any previous travel or known case. That last one is particularly worrying because it's likely to be a very laggy indicator of a much bigger pool of undetected cases - because Singapore traces contacts backwards aggressively, the disease has to have been circulating undetected for quite a while beforehand in order to cause this, and since unlinked cases are much harder to detect they're probably not finding most of them. I don't think this is just restricted to foreign worker dorms either, though those are a big problem right now; this seems to go back well before they found all those case in dorms.

The problem is that this doesn't seem to be universally true. Singapore and Hong Kong have had to bring the hammer anyway.