ET has the scoop...

New York officials released a statement Thursday warning that a bartender at a trendy Manhattan bar where ASHTON KUTCHER celebrated his birthday last week is infected with Hepatitis A.
Anyone who patronized Socialista in the West Village during certain times and hours between Thursday, February 7 through February 10 is at risk of having been infected and should be vaccinated, the NYC Department of Health and Mental Hygiene warns in the statement.
A-list names like MADONNA, GWYNETH PALTROW, KATE HUDSON, BRUCE WILLIS, LUCY LIU, ERIC DANE, REBECCA GAYHEART, ALI LARTER and designer ROBERTO CAVALLI reportedly attended the 30th birthday bash. Bar owners estimate that between 700-800 people may have visited the establishment during the time the sickly bartender was working.