Viral Infections USMLE Step 1 Practice Question
A 26 year old graduate student develops abrupt fever, myalgias, headache, and dry cough during January. Several classmates are similarly ill. Public health officials are concerned because this strain contains a novel hemagglutinin subtype that emerged after reassortment in pigs. Which of the following is the most likely causal organism?
Answer choices
- AParainfluenza virus
- BRespiratory syncytial virus
- CInfluenza A virusCorrect answer
- DMeasles virus
- EAdenovirus
- FCoronavirus
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