influenza viruses and e coli bacteria

aids animal antivirus artery bacillus backgrounds bacteria bacterium biological biology biotechnology blood body cancer cell clinic cold coli condition culture death disease drug experiment flow flue focus genetic group health healthcare healthy human illness infection influenza laboratory life lifestyle macro magnification medical medicine micro microbe microbiology microcosmic microcosmos microscopic nano objects organism parasitic pathogen people protection salmonella science scientific serum sick sickness spread subtilis surface therapy vector virus viruses