[TrudyM]

The theory is that if you take certain supplements that it will boost the immune system. My doctor says that the dehydration and the fact that the tray tables and arm rests are full of germs from past flights is the biggest issue. I have a small pack of travel wipes and clean down the whole area and put a scarf over the bendy part of the head rest so my face isn't on another persons germs. It seems to help more than when I took airborne. Hubby the retired Boeing Design guy says the engineers who designed the airscrubers say they aren't used as efficiently as they were designed to as it costs them fuel to run them at optimal so the airlines have them turned down ie more recycled germs.