view viruses under a magnifying glass with curved red arrow

view viruses magnifying glass curved red arrow coronavirus science health virus magnifire influenza medical virology microbiology epidemic pathogen vaccine illness sars biology infect concept pandemic human render infection disease flu corona coronavirinae outbreak asian pastel microbe coronaviruses diagnosis lethal new strain bacterium pathogenic cell medicine fever immunity contagious background bird bacterial superbug symptoms sickness mers infectious illustration cells 3d