caucasian scientific experimenter man wearing blue protective rubber gloves and standing in laboratory. science and covid19 visus

beaker biotechnology blue caucasian chemical chemistry clinic concept coronavirus covid19 disease doctor epidemic experiment experimental experimenter flu germs glove gloves hand health hospital infection influenza inhibit lab laboratory man mask medical medicine pandemic pathogens patient pharmacy prevention protection protective quarantine researcher rubber safety science scientific scientist sign specialist standing stop substance surgical uniform virology virus visus wearing