Are you the worst passenger on the plane?

You are if you do this, but here's how to avoid it

On a recent flight from Charleston, S.C., to Newark, Sukrut Dwivedi noticed a passenger a few rows ahead of him coughing violently and uncontrollably.

"The man appeared feverish and kept reaching for tissues," says Dwivedi, a physician who works for ID Care, an infectious disease care provider. "I could see the passengers around him were very uncomfortab…