Part 1 of Essay
What is the ? A is a contagious viral infection of the upper respiratory tract. The symptom of a are stuffy nose, congestion, runny nose, fever, headache, cough, sore throat or fatigue in the body. A could have one or a few of these symptoms. What are the causes of the ? Colds are caused by one of hundreds of common vir ....

Part 2 of Essay
.... thinks that the accumulation of stress tips the infected person over into illness. In his study of 72 married white men for a period of 12 weeks, in which they kept daily diaries of their stress. Researchers then measured the subjects' saliva for a substance called secretary immunoglbulin-A antibody, the less they had of it, the more likely it was that the subject would come down with the cold. This may be true according with Dr. Stone, but an argument made by Dr. Gwaltney, "You see, you could have a ton of imm ....