pneumonia coronavirus 2019-ncov or covid-19 spreading 3d

2019 2019ncov antibiotics background bacteria bacterial bacterium biochemical biohazard biologyn concept contagious coronavirus covid covid19 danger dangerous death diagnosis disease epidemic epidemiology fever flu global health illness illustration infect infection infectious influenza italy medical medicine microbiology microscope microscopic ncov new outbreak pandemic pathogen pneumonia sars science spreading strain virology virus warning