a hand in a blue sterile glove holds an airtight bag with a cotton swab.

airtight analysis analyzing background bacteria bag biochemistry biology blue care check clean clinical copy coronavirus cotton covid19 diagnosis diagnostic disease dna epidemic equipment evidence flu forensic genetic germ glove gloves hand health holds infection isolated laboratory medical medicine microbiology offense package pandemic pcr pneumonia quarantine research saliva sample sampling science sealed sick smear space sterile swab technology test theme virus white