The last three times we have flown we have come down with a virus either my husband or myself. Puts us out of commission for a few days. ( A cold and terrible chest problem). I am very concerned about this and would like to know what we can do to prevent this. I am also concerned about having my 87 yr, old mother coming for a visit. The flight is from one end of the country to the other........Flying has become a nightmare and we try not to fly at all.