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What is Characteristic feature of viral pneumonias is ? and explain in detail?
Ans. is 'a' i.e., Interstitial mononuclear infiltration The predominant histological pattern in case of viral penumonias is the interstitial nature of the inflammatory reaction viually localized within the walls of the alveoli. The infiltrates are usually mononuclear cells such as -lymphocytes, histocytes, plasma cells