Vaccine Safety Datalink (VSD)

The Vaccine Safety Datalink (VSD) is a collaborative project between CDC's Immunization Safety Office and nine health care organizations. The VSD started in 1990 and continues today in order to monitor safety of vaccines and conduct studies about rare and serious adverse events following immunization. The VSD uses electronic health data from each participating site.

Flu Symptoms & Complications | Seasonal Influenza (Flu) | CDC

Influenza (also known as the flu) is a contagious respiratory illness caused by flu viruses. It can cause mild to severe illness, and at times can lead to death. The flu is different from a cold. The flu usually comes on suddenly.

Lyme Disease | Lyme Disease | CDC

Information on Lyme disease. Provided by the U.S. Centers for Disease Control and Prevention.

Cancer Prevention and Control

CDC is a leader in nationwide efforts to develop, put into action, and promote effective strategies for preventing and controlling cancer.

Coronary Artery Disease: Causes, Diagonosis & Prevention|

Learn what causes coronary artery disease (CAD) and how it is diagnosed. Get the facts from the CDC, the leading health protection agency in the U.S.

CDC Works 24/7

As the nation's health protection agency, CDC saves lives and protects people from health, safety, and security threats.

High Blood Pressure (Hypertension) Information |

High blood pressure (hypertension) is a common but dangerous condition. Get information about high blood pressure from the CDC.


Behavioral Risk Factor Surveillance System (BRFSS) The BRFSS is an annual state-based telephone survey of the U.S. civilian, non-institutionalized adult population. The core questionnaire contains questions asked of all respondents, while states may choose to also include optional modules addressing various topics. The core questionnaire asks about whether a person has been diagnosed with depression.

STD Facts - Human papillomavirus (HPV)

HPV - What is genital HPV infection? How common is it? How does HPV cause genital warts and cancer?

Hepatitis C FAQs for the Public | Division of Viral Hepatitis | CDC

People with chronic Hepatitis C should be monitored regularly by an experienced doctor. They should avoid alcohol because it can cause additional liver damage. They also should check with a health professional before taking any prescription pills, supplements, or over-the-counter medications, as these can potentially damage the liver.