(CBS) A case of swine flu has confirmed at the offices of a top accounting firm in New York City, reports CBS News’ Ryan Corsaro and Chris St. Peter.

Ernst & Young employees who work in the company’s Times Square offices in Manhattan were notified Monday that an employee had been diagnosed with swine flu.

“A staff member at 5 Times Square became ill Sunday after contact with a family member who had been exposed to the virus. She has now been treated, is resting at home and is doing well,” employees were told in a company e-mail sent Monday.

The Ernst & Young employee infected with swine flu had not been at work since last Thursday.

The e-mail to employees also noted that there is a 24-hour incubation period of the disease, citing information from the Center for Disease Control.

“Therefore we believe it is unlikely there will be further infection among our people,” the e-mail read.