© 2020 photos under CC BY 2.0.

Doctor with stethoscope and 3-ply mask in white uniform, holding a test tube with red liquid inside, on blue background


Doctor with stethoscope and 3-ply mask in white uniform, holding a test tube with red liquid inside, on blue background
Doctor with stethoscope and 3-ply mask in white uniform, holding a test tube with red liquid inside, on blue background

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