Influenza A and B viruses cause seasonal epidemics of disease almost every winter in the United States, while influenza C causes only mild respiratory symptoms and is not thought to cause epidemics, according to the CDC. A fourth type of influenza, type D, is not known to cause illness in ...
百度试题 结果1 题目Which of the following symptoms is not typical of influenza? A. Fever B. Malaise C. Rash D. Muscular aches 相关知识点: 试题来源: 解析 C 反馈 收藏
Influenza A Virus Influenza A virus is a global common exposure with seasonal variation. Influenza A viruses infect and replicate in cells in the respiratory epithelium. In addition to sickness symptoms, including hypersomnia during acute infection, cases with neurological complications are oft...
The incubation period or illness onset time (time between exposure and symptoms) for the flu is from 2-4 days. Flu vs. Cold Many people commonly and incorrectly confuse influenza infection (the flu) with the common cold. The common cold is a mild infection frequently caused by many ...
Learn about influenza (flu) symptoms, treatment with antiviral drugs, flu shot side effects, and prevention during flu season. Discover when to get the flu vaccine, how long the flu lasts, the contagious period, flu types, and how it spreads.
Since the 1970s influenza B has diverged into two lineages based on antigenicity, the Yamagata and Victoria lineages, with little or no serum cross-reactivity [4]. In contrast to the severity and epidemic potential of influenza A and B, influenza C infections induce only mild flu symptoms in...
In addition to causing the common cold, there is now convincing evidence that HRVs play a significant role in causing lower respiratory symptoms. HRVs can replicate in the lower airways and do appear to play a critical role in causing exacerbations of asthma and otherchronic lung diseas...
Some LPAI (eg, H7N2, H7N3, and H9N2) and HPAI strains (H7N7) only cause asymptomatic or mild symptoms, such as conjunctivitis or uncomplicated influenza- like illness, in humans[12, .37–42] In current human infections with LPAI (H7N9), a typical influenza-like illness (eg, fever ...
Influenza A virus vaccine-H1N1/influenza virus vaccine: Skin rash, flu-like symptoms, exacerbation of pulmonary fibrosis, and bronchiolitis obliterans organising pneumonia in elderly patients: 2 case reports
Within the virion, each of the eight viral segments forms a viral ribonucleoprotein (RNP) complex: viral RNA is wrapped around NP, and this structure is then bound to the viral polymerase complex. b | The antigenic properties of HA allow the classification of influenza A viruses into two ...