(CNN) -- As the swine flu outbreak escalates across the globe, U.S. travelers returning from Mexico are wondering what to do when they come home. Travelers leaving a Mexican airport fill out questionnaires about their health. On Wednesday, Christine Kovar of San Francisco, California, returned from a vacation to Nuevo Vallarta, Mexico. She said she wasn't sure whether she should attend work or stay home. "I feel fine," said Kovar. "It will be the discretion of my boss whether I go back to work." The Centers for Disease Control and Prevention in Atlanta, Georgia, is advising U.S. travelers back from Mexico with at least two of the swine flu symptoms to stay at home and avoid public places upon return. Symptoms of swine flu, also known as 2009 N1H1, can include a fever, sore throat, cough, chills, headaches and runny nose.
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Travelers with flu-like symptoms coming back from Mexico should stay at home
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Healthy travelers coming from Mexico can continue to go to work and school
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There are more than 230 confirmed cases of swine flu worldwide, according to WHO
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Companies and schools are erring on the side of safety asking people not to come
In contrast, at some @placeholder airports, travelers are asked to fill out forms asking about his or her health, passengers interviewed say.