• Antimicrobial (Drug) Resistance National Institute of Allergy and Infectious Diseases
  


• Bacterial Infection vs. Viral Infection: What's the Difference? Mayo Clinic
  


• Biology of Infectious Diseases Merck Manual, Home Edition
  


• Children's Infectious Diseases New South Wales Health Department, Australia (also in Arabic, Chinese, Farsi/Persian, Indonesian, Japanese, Korean, Serbian, Spanish, Turkish, Vietnamese)
  


• Diseases Spread by Animals NOAH
  


• Enlarged Spleen (Splenomegaly) Mayo Clinic
  


• Everyday Roles American Society of Microbiology
  


• Flooding and Communicable Diseases Fact Sheet World Health Organization
  


• Fungal Infections Nemours Foundation (also in Spanish)
  


• Germs: Understand and Protect Against Bacteria, Viruses and Infection Mayo Clinic
  


• Hand Washing Nemours Foundation (also in Spanish)
  


• Infectious Diseases Mayo Clinic
  


• Parasitic Infections Merck Manual, Home Edition
  


• Repeated Infections in Children American Academy of Family Physicians (also in Spanish)
  


• The Spleen JAMA Patient Pages (also in Spanish)
  


• Splenectomy American Academy of Family Physicians (also in Spanish)
  


• Swollen Lymph Glands Mayo Clinic
  


• Understanding Microbes in Sickness and In Health National Institute of Allergy and Infectious Diseases