A lot of spraying is just public health theater. How does running trucks and people through neighborhoods spraying roads and all surfaces kill any virus. It is similar to carpet bombing to eliminate rodents. I saw this first in pictures out China and wondered how effective that is and how harmful to public health and what exactly are they spraying?

Bizarre.

Disinfecting public surfaces like poles and seats in subways is another category. Is it benign? Does it expose workers to the virus? Does it blow a hole in public finances or simply give work to underemployed city workers. Who touches those surfaces anyways?

Would be impressive if it killed something not living.

We'd be in a much better position to opine if we actually knew what they were spraying. Haven't found anything online to that effect but I've been very curious.