https://joy.videvo.net/videvo_files/video/free/2020-04/large_watermarked/200401_Medical%206_06_preview.mp4 Close Up of Pipette Handle During Operation Close up of the handle of a multi-channel pipette being operated in a lab. biochemistrybiologybufferchemistrycorona viruscoronaviruscovid-19cultureculturinginstrumentlablaboratorypbspharmapharmaceuticalspipettepipettingresearchsalinesamplesamplessciencescientificscientistsolutiontechniciantestingvaccine