Don't take any lingering ailment for granted. Last year my friend Jerry along with several others got the creepin crud while working the San diego Boat Show. Everybody but Jerry eventually got better after several weeks. He finally went back to the doctor who was concerned with his oxygen levels being low and suggested he come back in a day or two if he wasn't feeling better. He died that night in his sleep of a heart attack that was probably induced by the low oxygen level. Had he sought follow up treatment sooner he might still be with us. I sure miss him.