File picture shows Costa Rica’s President Arias walking in his residence after a meeting in San Jose

Costa Rica’s President Oscar Arias walks in his residence after a meeting with Spanish Vice President Maria Teresa Fernandez de la Vega, Ibero-American General Secretary Enrique Iglesias and Secretary General of the Organization of American States (OAS) Jose Miguel Insulza in San Jose in this file picture taken August 3, 2009. Arias is suffering from the H1N1 virus, the government said on August 11, 2009, making him the first head of state known to have contracted swine flu. Picture taken August 3. REUTERS/Juan Carlos Ulate/Files (COSTA RICA POLITICS HEALTH) COSTARICA/