Eighty-one people have so far died of swine flu in Mexico this year, while at least 3,522 have been infected with the virus, health officials said.
From January 1 till February 9, there have been 3,882 confirmed flu cases, the health secretariat said in a statement.
Three seasonal viruses are currently active in Mexico -- AH1N1, AH3N2 and influenza B. The AH1N1 -- or swine flu -- has been the predominant one, with 91 percent of the infections.
The AH1N1 virus broke out in Mexico in March-April 2009. By June 2010, around 1,300 deaths had occurred and more than 70,000 people had contracted the disease.
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