Trabajador médico añadiendo algunas gotas de líquido azul en tubos de ensayo, química - Foto e imágenes de stock

Female chemist adds drops of blue substance into test tubes, lab research

Scientist dripping sample into test tube in laboratory, closeup. Medical research

Close up shot of female doctor scientist holding glass test tube with blue liquid providing experiment to detect virus, pharmacist working on vaccine against COVID-19, cure concept

Doctor filling syringe with medication in clinic, focus on hand. Vaccination and immunization

Lab worker holding tube with liquid, checking transparency, medical research

Lab worker holding water sample in test tube, analyzing minerals concentration

Laboratory assistant pouring green liquid into test tube, organic products

Lab worker dripping yellow liquid in test tube, oil quality control, experiment

Female intern mixing blood with reagent in tube, biochemical experiment

Laboratory worker holding test tube with blue liquid, conducting experiments