Smallpox one-third of the cases resulted in blindness. These deaths included those of four reigning monarchs and a queen consort. In the 20th century smallpox killed 200-300 million people. Edward Jenner discovered in 1798 that vaccination could prevent smallpox. In 1967, the WHO intensified efforts to eliminate the disease. Smallpox is one of two infectious diseases to have been eradicated, the other being rinderpest in 2011. The term "smallpox" was first used in Britain in the 15th century to distinguish the disease from syphilis, which was then known as the "great pox". Other historical names for the disease include pox, speckled
To the Youth in Western Countries the evolution of terroristic groups like al-Qaeda, the Taliban, and ISIL—"the spawn of such ill-fated pairings with imported cultures." Khamenei also pointed out the "oppressed people of Palestine", who "have experienced the worst kind of terrorism for the last 60 years." For this, he criticised Israel, its allies and international organisations. Twitter accounts that tweeted the letter were reported to have been temporarily suspended for sending spam messages. Some were reactivated with apologies from the network and a warning about sending similar messages again. This sometimes led to multiple resuspensions. To the Youth in Western Countries On 29 November 2015,