antibody production. immunity fights viral infection. 3d , pandemic, epidemic, viruses and their mutations

abstract airborne antibodies antibody antigen aquatic bacillus bacteria bacterial bacterium blood body cell closeup cold colony coronavirus disease epidemic epidemiology evolution fights genetic genome germs illustration immunity immunoglobulin infection infections inside macro medical micro microbe microbes microbiology microscope microscopic molecule mutation mutations nano organism pandemic pathogen production research scientific their toxin vaccine viral virology virus viruses wallpaper