Maybe you can tell us why Shanghai could do this and NYC could not. What are the major differences in the 2 locales - in general and specific to late December up til now?
I think NYC could have but didn't.
A few advantages Shanghai had:
- there was a raging epidemic in a central province which focused attention
- it was cold rainy weather in Jan and Feb so people stayed in more due to bad weather and it was easier to abide by the lockdown when it was implemented circa Jan 24. (also easier to wear masks in public in cold weather -- though that's largely irrelevant since you folks didn't have masks to wear or not wear)
- Chinese New Year was officially from Jan 24 - 30. And so many businesses and most of the city was already in holiday shut-down mode, which is extensive (as in most years it's deserted enough you can walk down the center of many streets).
Shanghai Disadvantage:
- they had to deal with millions of folks returning to Shanghai after the holiday ended, some no doubt coming from in or around Hubei. SH extended the holiday another full week, and tried to ensure people returned gradually and not all at once. Some also postponed returning to a crowded urban zone, if they were able to.
New York Advantages:
- at least 2 months to prepare. And to observe what worked well in Asia.
- less population than Shanghai, maybe half as many people.
- warmer Spring weather could hamper transmission -- but also gets more people out in public longer -- so can cut both ways
I just think there was a failure of leadership, a failure to prepare, inexcusable shortages, mixed messages, people didn't take things seriously, unnecessary delays. To defeat the virus you need planning and timeliness and thorough measures being complied with. Once you fritter away valuable time and wait until the virus is already spreading within your borders, it is much harder to contain and eradicate. Infections and deaths increase dramatically and resources dwindle.
There was nothing draconian employed in Shanghai. Just lots of good measures that limited transmission. There was no law that said you had to wear a face mask, but everyone did in public, and after the first week the food stores and few other open public buildings wouldn't allow you in without a temp check and face mask.
I think the SH airport could have done better to space people out and avoid crowds (masked, but still crowds). But in the city, I thought the measures were sensible, thorough, and effective.