Really well-researched, good job.

NYC has several aggravating factors as well as the 1 in 4 obesity rate:
1) NY air pollution causes 6000 emergency hospitalizations and 3000 deaths per year

2) New Yorkers work the longest hours in the US. Sleep is good medicine for a viral infection, especially in the early stages when fatigue may be the main symptom (as it was with my family) and can keep it from developing.

3) New Yorkers rank 5th in the US in terms of work stress, so their parasympathetic nervous system is suppressed. That means that maintenance of the body and the immune system is not functioning properly, nor is digestion.

4) I’m not sure what it was like in the US, but here in the UK government and health service advice on household immune boosters was almost nil. My granny hit the raw garlic when she was sick, and elderly people often know that sage, rosemary etc in their food and high-dose ginger tea can help, but those strategies are rarely followed by the younger generation.

More details here:
https://medium.com/@RevNemu/and-then-came-the-virus-2-3-f95a1fe2c8c7