Researcher hand showing tube, positive result of blood test for coronavirus, covid-2.
Researcher hand showing tube, positive result of blood test for coronavirus, covid-2.
Researcher hand showing tube, negative result of blood test for coronavirus, covid-2.
Doctor showing tube, positive result of blood test for coronavirus, covid-19.
Doctor showing tube, positive result of blood test for coronavirus, covid-19.
Doctor showing tube, positive result of blood test for coronavirus, covid-19.
Doctor showing tube, negative result of blood test for coronavirus, covid-19.
Researcher hand holding test tube for checking covid-19 in the blood.
Man-researcher is working with blood in test-tube in a laboratory
male scientist in the lab spbas . Researcher research to find the results of the experiment. doctor testing bloods to prevent and destroy new strains of the coronavirus through microscopy. COVID-19
Doctor with blood tube with positive result of covid-19
Blood tube with covid-19 positive result in a hands