Pandemic smallpox was responsible for 300–500 million deaths. As recently as the early 1950s, an estimated 50 million cases of smallpox occurred in the world each year. After successful vaccination campaigns throughout the 19th and 20th centuries, the WHO certified the eradication of smallpox in December 1979. To this day, smallpox is the only human infectious disease to have been completely eradicated, and one of two infectious viruses ever to be eradicated. Historically, measles was prevalent throughout the world, as it is highly contagious. According to the U.S. National Immunization Program, 90% of people were infected with measles by age 15.
Driven to Tears that the song "has the driving force of Peter Green's Fleetwood Mac." Allmusic critic Chris True considers Summers' short guitar solo to be one of his best. Summers himself considered "Driven to Tears" one of the better songs Sting wrote that formed "the meat" of "Zenyatta Mondatta". A live performance ("circa" 1980) of "Driven to Tears" is the opening number of the film "Urgh! A Music War". Sting played "Driven to Tears" at the Live Aid concert in 1985. He also released a live version on his solo album "Bring on the Night" in 1986. That version included a solo