contagious virus recursion composition of contagious virus icons

2019ncov abstract abstraction axenic bacilla bacillus bacteria bacterium biohazard catarrrh chill collage combination composed composition contagious corona coronavirus covid2019 dangerous design element epidemic fever flu fractal illustration infect infection infectious influenza merscov microbe microbiology microorganism mosaic outbreak pandemic pathogen pattern pneumonia raster recursion recursive sars sickness viral virus