Canadians who have recently returned from Mexico should be on alert for flu-like symptoms that could be connected to a severe respiratory illness, federal health officials said Thursday in issuing a travel advisory.
A severe respiratory illness appears to have infected 137 people in south and central areas of Mexico, with cases concentrated in Mexico City and three other areas, including 20 deaths, the Public Health Agency of Canada said.
In the United States, health officials in Texas and California were scrambling this week to deal with a new strain of swine flu, which has been diagnosed in seven people.
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