If all of the 1,500 flights are medical or cargo then fine, but I doubt it. And with government assisted air carriers receiving loans to maintain a level of scheduled transport with passengers they are then paying to spread the virus. Its a matter of what is essential. Take it here in Scotland, a major Airport, Edinburgh last week had most days without any passenger movements. Thats the one of the ways to stop spreading the virus.
America has the most deaths from COVID 19 and I am sure if this air traffic continues it will get far worse. 54,974 deaths and nearly 1 million reported cases already the highest anywhere in the World. American population 328 million (54,974 deaths), UK population 66.5 million (20,000 deaths) China population 1.4 billion and only 4,600 deaths (if you believe that). Some thing early on went horribly wrong in both the UK and US, its like oh ! it won't happen to us, act before its too late, do not ease lockdown. Fortunately the UK is doing so now. The US seems to be a different story ?