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.
Cruel to Be Kind with the song "You've Got to Be Cruel to Be Kind" which was a UK hit for Unit 4 + 2 in December 1965, nor for the song "Cruel To Be Kind" by Spacehog, released in 1996. No doubt all of these songs owe their inspiration, directly or indirectly, to Shakespeare's "Hamlet" (Act III, scene 4), in which Hamlet tells his mother, "I must be cruel only to be kind." Cruel to Be Kind "Cruel to Be Kind" is a 1979 single by Nick Lowe, co-written by Lowe and his former Brinsley Schwarz bandmate Ian Gomm, that peaked at No.