At least 500,000 residents of Mexico City have got vaccinated against the A/H1N1 flu, the city's health official told media on Wednesday.

The city has launched a vaccination campaign in the main stations of its metro, light railway and its largest markets.

Armando Ahued, head of Mexico's health department, urged the residents to get vaccinated because a series of cold spells were passing over the city raising risks for respiratory illnesses, including the A/H1N1 virus.

The A/H1N1 flu had killed 780 people and infected more than 67,200 others in the country till the end of 2009 since its outbreak in mid-April.

(Xinhua News Agency February 18, 2010)