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A-D, Representative CT images before and after BNT162b2 mRNA COVID-19 vaccination. A and B, Baseline high-resolution CT scan performed 6 weeks before the BNT162b2 mRNA COVID-19 vaccine was given was definite for usual interstitial pneumonia. C and D, After the vaccination, the CT angiography was negative for pulmonary embolism but revealed new areas of diffuse ground-glass opacities with background interstitial pneumonia.
