A passenger arriving in a flight from Mexico wears a mask at Barcelona's airport April 27, 2009. A case of swine flu has been confirmed in a patient in Spain and 17 sick people are under investigation, the Health Ministry said. Countries around the world have moved to contain the spread of a possible pandemic after a new swine flu outbreak killed 103 people in Mexico. REUTERS/Albert Gea (SPAIN SOCIETY TRANSPORT DISASTER HEALTH)