In spring 2009, the world treated the so-called swine flu outbreak with extreme caution. This dangerous virus was known before. Since the start of the 20th century it has caused more than 50 million deaths. In 2009, the virus was spreading fast -- more and more countries reported new cases each day. It traveled from Mexico to Japan in several weeks. The World Health Organization has declared the outbreak of a pandemic. What's next? Find out in RT's XL Report.