Vaccine is the most effective public health tool we have ever had and immunization saves annually about 2 to 3 million lives. These facts and further thoughts on the importance of immunization are emphasized by Dr Margaret Chan on the website of the Bill & Melinda Gates Foundation. Her recent blog post reveals that 23 million infants are still potential victims of life-threatening diseases. To further promote immunization, WHO published its Global Immunization Vision and Strategy in 2005. In order to reach its goals, WHO cooperates with a number of partners such as the Bill & Melinda Gates Foundation.