According to the article, "Viral infections and allergies", from Immunobiology, 2007, which of the following statements is NOT correct? (A) Respiratory viral infections play both an enhancing and a protective role in development of allergy-related illness. (B) Respiratory syncytial viruses (RSV) are considered to be the most prevalent respiratory pathogen in recent studies. (C) A number of factors, such as the type of agent, the severity of the disease, the time of the infection, and most importantly host predisposition play a crucial role in development of allergy-related illness after viral infections. (D) In infants and young infants, poor IL-12, IL-18, and IFN-γ production results in a limited Th1 response, despite up-regulated TNF-α. (E) Large family, repeated exposure to viral infections, low-grade RSV infection, vaccination against HBV, and single incidence of Salmonella gastroenteritis during childhood may protect people from allergy-related diseases. Ans. B -- 题目好像有点过长 --

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