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  1. Hace 19 horas · Social history of viruses. Young people with polio receiving physiotherapy in the 1950s. The social history of viruses describes the influence of viruses and viral infections on human history. Epidemics caused by viruses began when human behaviour changed during the Neolithic period, around 12,000 years ago, when humans developed more densely ...

  2. en.wikipedia.org › wiki › BrazilBrazil - Wikipedia

    Hace 19 horas · Brazil, officially the Federative Republic of Brazil, is the largest and easternmost country in South America and Latin America.It is the world's fifth-largest country by area and the seventh most populous, with over 205 million inhabitants.It is the only country in the Americas to have Portuguese as an official language, and is by far the largest Lusophone country in the world.