green microorganism with long legs moving and generating infection, ideal for educational and scientific projects

microorganism bacteria virus germ microbe infection disease biology microbiology science health medical illness pathogen microscopic organism green legs moving generating educational scientific project healthcare medicine contamination biohazard cell bacterium hygiene unhealthy epidemic pandemic flu covid sickness influenza sars coronavirus ebola aids hiv salmonella staphylococcus streptococcus escherichia coli clostridium difficile