The 2009 swine flu pandemic in Brazil began on April 25, 2009 with two people, spreading to 34 over the first two weeks. CDC calculate that Africa and Southeast Asia, which have 38% of the world's population, accounted for a disproportionate 51% of the deaths. The press release also stated that airports would monitor travelers arriving from affected areas, under the direction of the National Sanitary Surveillance Agency (ANVISA). Air crews are also being trained on signs and symptoms of swine influenza so that passengers displaying symptoms may receive guidance from ANVISA upon arrival.