It probably is working, but it also seems likely that locking everyone in their houses reduces spread -- so three weeks after lockdown, there are fewer sick people to find each day.
It actually is likely that the decrease in cases is more dramatic than the numbers show -- now that the acute pressure on the healthcare system in New York has abated, they're probably detecting a higher percentage of their cases.
(And on top of that, testing has begun increasing again -- we tested 127,000 people today, up from 107,000/day just 6 days ago.)
In case anybody is still looking at the case numbers (especially in NY) and wondering why they keep kinda not going down even though things look better, we are actually still increasing testing rates (despite what you may have heard)
As I said above, we tested 127,000 people yesterday.
It actually is likely that the decrease in cases is more dramatic than the numbers show -- now that the acute pressure on the healthcare system in New York has abated, they're probably detecting a higher percentage of their cases.
(And on top of that, testing has begun increasing again -- we tested 127,000 people today, up from 107,000/day just 6 days ago.)