Bangkok, Thailand: Thai students wear face masks at a school

Guatemala City: A girl wearing a face mask, leaves school

Mexico City, Mexico: A man stands in front of a thermal camera, set up to screen outgoing passengers as a precaution against the spread of swine flu, at the international airport

Hong Kong, China: A girl wearing a mask sits with her classmate at a kindergarten in a residential estate. Hong Kong authorities today ordered all primary schools in the city to be closed for two weeks after the first cluster of local swine flu cases was found

Manila, Philippines: A student nurse uses a thermal scanner as she checks the temperature of a foreign student for possible swine flu infection before entering the school compound

Guatemala City, Guatemala: A woman wearing a face mask waits for a doctor at the emergency room of the San Juan de Dios hospital

Hyderabad, India: A security guard patrols a corridor outside an isolation ward at the government chest hospital

Beijing, China: Two masked airport employees flank passengers at Beijing international airport