Mozart and smallpox the imperial family were successful, and led to greater public acceptance for the procedure. Smallpox struck the Mozart family again in the next generation: Nannerl's eldest son Leopold and two of her stepchildren caught the disease during an outbreak in the Salzburg area in 1787. All three children survived. In 1796, the discovery of vaccination—the use of the related cowpox virus to immunize against smallpox—by Edward Jenner revolutionized the ability of medicine to deal with smallpox. Vaccination reached Vienna around 1800, when yet another local epidemic created impetus for its adoption. One of the doctors trained in the Vienna campaign,
To the Youth in Western Countries and the 2015 Beirut bombings. As of December 26, 2015, the letter has been translated to 62 languages in a collaborative effort conducted by The Representative of the Supreme Leader in the University of Mohaghegh Ardabili, Al-Mustafa International University graduates, the Ministry of Foreign Affairs, the IRIB World Service and the countries' respective embassies. In about two thousand words, Khamenei discussed the reasons for the worldwide wave of terrorism, calling it "our common worry". Among them he noted the impact that major Western powers had with their military operations in the Islamic world. He mentioned United States's alleged role in