a man in a scientist`s uniform was injecting a germicidal tray. the idea of inventing a vaccine to treat and prevent covid-19 tha

ampoule analysis biochemistry biology care chemical clinic coronavirus covid covid19 diagnostic disease doctor drug epidemic experiment flu germicidal health hospital idea illness immune infection injecting injection inventing lab laboratory liquid man mask medical medication medicine microbiology nurse outbreak pandemic patient people pneumonia prevent protection protective research researcher sample science scientific scientist scientists spreading syringe test tha that tray treat treatment uniform vaccine virology virus was world