epidemiological researchers in virus protective clothing holding inoculating needle and chemical petri dish. covid-19 testing

2019 analysis analyzing banner biochemistry biohazard biology biotechnology chemical chemist chemistry clothing control copy coronavirus corvid19 covid19 dangerous diagnostic disease dish doctor epidemic epidemiological equipment experiment face health holding infect infection inoculating lab laboratory medical medicine microbiology needle petri pharmaceutical process protection protective research researcher researchers sample science scientific scientist space technology test testing vaccination vaccine virology virus