1media/2048px-Louis_Pasteur,_foto_av_Paul_Nadar,_Crisco_edit_thumb.jpg2024-07-18T22:30:29+00:00Ivan Portillo741ad6f42573dbb784db9511d4627772eb86aa193673French scientist Louis Pasteur developed chicken cholera, anthrax, and rabies vaccines. He used a process called attenuation, which reduced the virulence of pathogens while keeping them live, making them safe for use in vaccines. Image Attribution: Paul Nadar, Public domain, via Wikimedia Commonsplain2024-07-19T16:44:57+00:001870-1889Ivan Portillo741ad6f42573dbb784db9511d4627772eb86aa19