id author title date pages extension mime words sentences flesch summary cache txt cord-017656-lqrkwlnb Lee, Wang Jae Common Cold and Flu 2019-08-07 .txt text/plain 3887 162 53 Inflammatory cells are markedly increased in BAL fluid, providing the immunological evidences that daily supplementation of high-dose vitamin C can prevent influenza infection and that, in extreme case, it can save the life. One is that the common cold comes from an imbalance between the human defense system and the normal viral flora, which normally reside at the initiation part of the respiratory system such as the nasal cavity and nasal or oral pharynx so that they usually do not induce new immunity against the normal floral virus. Unlike the common cold, which is usually not infected by a foreign pathogen but is just a kind of battle between the body defense system and the normal flora of viruses residing in the upper respiratory system, the flu is a disease caused by an influenza virus infection. ./cache/cord-017656-lqrkwlnb.txt ./txt/cord-017656-lqrkwlnb.txt