AP

New York, May 25: A New York City woman died over the weekend of swine flu, becoming the city's second victim and America's 11th. 

The World Health Organization, as of Friday, had tallied more than 12,000 swine flu cases worldwide, with more than half of them in the United States. It counted at least 86 deaths, with 75 of those in Mexico.

The New York woman, who was in her 50s, had other health conditions, Department of Health and Mental Hygiene spokeswoman Jessica Scaperotti said. No other information on her case was disclosed.

Assistant public school principal Mitchell Wiener, who died on May 17, was the city's first death from the virus. The 55-year-old had been sick for several days.

There were 280 confirmed cases of swine flu in the city and 94 hospitalisations as of Sunday, Scaperotti said. The number of confirmed cases probably doesn't fully reflect the spread of the virus, given that health officials aren't testing everyone for the H1N1 strain.

"It's most likely that if you're sick with the flu, that you have the H1N1 virus," Scaperotti said.

Those people with chronic health conditions such as diabetes and compromised immune systems who are suffering from flu-like symptoms should seek medical advice, Scaperotti said.