structure of virus bacteriophage

anatomy bacteria bacteriophage bacterium baseplate biology biotechnology cell contagion diagram dna education epidemic fiber flora genomes head health histology human illness illustration immune immunity immunological infect infected infection infectious inject injecting invaders invasion laboratory macro magnification medical medicine micro microbe microbes microbiology microorganism microscope multiple nucleic nucleus pathogenic protein research rna scheme schooling science sheath spikes structure system vector viral virions virus viruses