Over the last week I flew quite a lot. The week started with a delay in PER because QF had to offload someone who was "unfit to fly". What does that mean ? On the next leg, the guy next to me coughed his lungs up for the entire flight and I had to cover my nose & mouth with a tissue. Was he fit to fly ? Finally, returning to PER from SYD, another guy one row back coughed incessantly for 4 1/2 hours, Fit to fly ? What do members think on this topic ? Should pax wear a mask if they are coughing or have the flu, should they fly at all ?