They are doing a good enough job as it is. I went to Seattle this summer and took the redeye home. Every seat was booked. I was literally shoulder to shoulder with the guy next to me. He coughed continuously for four and one half hours.

I came down sick five days later and was mostly sick for five weeks afterwords. It took two different antibiotics to shake whatever that evil person gave me. Made one cry out for the Chinese public health system.