Drawing of the 1918 Influenza: Trachea showing earliest stage of reaction in influenza. Epithelium intact, but basement [?] slightly swollen as [?], with congestion and some small cells influtration of sub[?]. Hyaline deposits over epithelium

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Credit: Drawing of the 1918 Influenza: Trachea showing earliest stage of reaction in influenza. Epithelium intact, but basement [?] slightly swollen as [?], with congestion and some small cells influtration of sub[?]. Hyaline deposits over epithelium. Credit: Wellcome Collection. Attribution 4.0 International (CC BY 4.0)