bacteriophage attacking bacteria

abstract attack bacteria bacteriophage bacterium biochemistry biology capsid cell contagion contaminated disease dna drug epidemic epidemiology flu genetic h1n1 health host human immunity immunological infect infection inject invaders invasion macro medical medicine microbe microbiology micrograph microorganism microscope molecules nano nucleic organic organism outbreak pandemic phages physiology replication research retrovirus science scientific sick sickness transmission viral virology virus