Doctor hands analyzing Coronavirus COVID 19 test blood Foto: Marco Verch | ccnull.de | CC-BY 2.0 Sizes: 150 × 150 / 300 × 201 / 768 × 514 / 1,024 × 686 / 1,536 × 1,029 / 2,048 × 1,372 / 250 × 250 / 600 × 400 / 300 × 200 / 400 × 200 / 130 × 90 / 747 × 500 / 272 × 182 / 2,560 × 1,715
