Vaccines protect against life-threatening diseases. Follow a recommended immunization schedule to protect yourself and others at all stages of life.| medlineplus.gov
Your immune system is made up of cells, tissues, and organs that fight infections and diseases. Learn how it works, and about diseases of the immune system.| medlineplus.gov
Used properly, antibiotics can save lives by fighting bacterial infections. Read about how to use antibiotics and about when not to use antibiotics.| medlineplus.gov