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SARS-CoV‑2 RNA detection by fluorescence in situ hybridization (FISH) in lung tissue from a SARS-CoV-2-positive patient (measurement bar = 50 µm), a HE lung and pulmonary vessel, b consecutive sectional step to a with positive RNA detection for SARS-CoV‑2 (red) in macrophages (I.), endothelia (II.), and capillary endothelia (III.) in the absence of signal in the negative control (neg. contr.)
