Boy wearing face mask and protective glasses using pipette and beakers in laboratory
Girl wearing face mask and protective glasses holding test tubes with chemical at laboratory
Boy wearing face mask and protective glasses using microscope in laboratory
Female teacher wearing face mask and protective glasses using microscope in laboratory
Boy and Girl wearing face mask and protective glasses at laboratory
Female scientist in protective face mask, glasses and gloves pouring blue chemical into test tube with pipette while working on vaccine research in laboratory
Female chemist in protective face mask, glasses and gloves pouring blue liquid into test tubes with pipette while doing scientific experiment in laboratory
Female teacher wearing face mask and protective glasses teaching students in laboratory
Female teacher wearing face mask and protective glasses teaching students in laboratory
Female teacher wearing face mask and protective glasses teaching students in laboratory
Girl wearing face mask and protective glasses holding container with chemical at laboratory
Female microbiology scientist in protective face mask, glasses and gloves pouring blue chemical into test tubes with pipette in laboratory while working on vaccine against covid