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An explanation of the statistics of HIV and AIDS. This is basic information on HIV statistics and surveillance.

July 28, 2014, marks the 4th annual World Hepatitis Day. Nearly 400 million persons are living with hepatitis B or hepatitis C, and more than 1 million die annually as a result of their infection. This year, the 67th World Health Assembly (WHA) reaffirmed the global commitment to prevent and control viral hepatitis through the passage of resolution WHA 67.

On February 4, CDC joins people, organizations, and government agencies around the world in exploring how everyone can help prevent and control cancer.

If you plan to travel to Brazil for the 2014 World Cup, follow these recommendations to stay safe and healthy.

The global tobacco epidemic contributed to 100 million deaths worldwide during the 20th century and continues to kill nearly 6 million persons each year, including approximately 600,000 from secondhand smoke. If current trends persist, an estimated 500 million persons alive today will die from the use of tobacco products. By 2030, tobacco use will result in approximately 8 million deaths worldwide each year.

During World Immunization Week, beginning on April 20th, CDC and partners around the globe aim to promote one of the world’s most powerful tools for health – the use of vaccines to protect, or immunize, people of all ages against disease.

Learn more about alzheimer's disease.

April 7, 2014 marks World Health Day and the 66th anniversary of the World Health Organization (WHO). This year’s theme is vector-borne diseases.

Know Hepatitis. Act Now. For World Hepatitis Day, learn more about the different types of viral that impact millions worldwide, and what you can do.

World Water Day, sponsored by the United Nations, is observed each year on March 22. This year, World Water Day focuses on water and energy. Water and energy are closely linked.