News Center Topics A-Z Infectious Diseases Infectious Diseases Stanford Medicine researchers are learning how infectious diseases, those common in the United States and in developing countries, spread and finding better ways to prevent and treat infection. Subtopics C-Diff Cold & Flu Covid-19 E. Coli HIV, AIDS HPV (Human Papillomavirus) Hepatitis Malaria RSV (Respiratory Syncytial Virus) STDs (Sexually Transmitted Diseases) Salmonella Tuberculosis Whooping Cough (Pertussis)