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Microscopic images of human stem cell–derived airway tissue models with cell nuclei (blue) and SARS-CoV-2 virus infected cells (green); tissue exposed to cigarette smoke (right) had 2 to 3 times more infected cells than non-exposed tissue (left).
Human induced pluripotent stem cell-derived cardiomyocytes (heart cells) shown in green and blue, are infected by the novel coronavirus SARS-CoV-2 (red)