An experienced laboratory assistant carefully examines a test tube with blood
Close-up of doctor in gloves holding test tube with blood inside, she examining it during scientific experiment in the lab
Doctor with blood tube with positive result of covid-19
Doctor put blood in tube in centrifuge for centrifugal plasmapheresis
doctor holding a test tube of blood and writing on a form
Closeup technician hand in glove holding test tube with blood. Female doctor examining blood sample for coronavirus. Unrecognizable scientist working in laboratory. Medicine and health concept