The Service Employees International Union said it had enough signatures to trigger a vote by personal assistants who care for relatives and friends at home.
Much of the research on exposure to the World Trade Center residue has focused on emergency workers, but people there when they were young say their health is at risk, too.
With no new cases reported in more than a week, New York City’s health commissioner says the threat has passed. Seven people have died from the disease this summer.
New York that has endured significant outbreaks in recent years. Some experts say officials should focus more on risks in plumbing systems, even shower heads.
The deaths brought the toll in the outbreak to three. The second person who died was an 88-year-old retired businessman who lived on the Upper East Side, his lawyer said.
An ongoing cluster of the illness has sickened 23 people. That’s not unusual: Most years, 200 to 700 people in the city are diagnosed with the disease.