A nurse holds a bedside discussion with a patient.


Influenza, commonly known as the “flu,” is a common upper respiratory (nose and throat) infection caused by the influenza virus. There are different types of flu viruses, and they can change from year to year.


HIV (human immunodeficiency virus) is a virus that attacks the body’s immune system and can eventually lead to AIDS. HIV is spread through certain body fluids, such as blood and semen.


MRSA is a type of staph infection. These serious infections (called “staph infections”) can affect the skin, wounds, or the blood.

Respiratory Syncytial Virus

RSV stands for respiratory syncytial [sin-SISH-uh l] virus, a common virus that affects the lungs. Learn about who is at risk for infection with RSV, typical symptoms, treatment, and ways to prevent this infection.