New York City health officials are closely monitoring two separate viral concerns this week, even as they continue to reassure residents that the public risk remains low. Health Commissioner Dr. Alister Martin confirmed Friday that the Department of Health and Mental Hygiene is tracking both a rare hantavirus outbreak tied to an international cruise ship and a small cluster of measles cases that have surfaced across the five boroughs since January.
The dual advisory comes at a sensitive moment for the city, with summer travel ramping up and the FIFA World Cup expected to draw thousands of international visitors to New York next month.
The Hantavirus Cluster
The hantavirus situation traces back to the MV Hondius, a Dutch-flagged expedition cruise ship that departed Argentina and traveled to Antarctica earlier this year. The World Health Organization flagged the outbreak on May 2 after identifying cases among the vessel’s passengers and crew.
To date, eight cases of the rare Andes strain of hantavirus have been confirmed among the 149 people who were aboard, including three deaths. Several passengers have since been evacuated from the Canary Islands and are flying home through various ports of entry.
“When it comes to hantavirus, measles virus, right now, the risk to New Yorkers remains extremely low,” Dr. Martin told NY1. His message to residents was direct: stay informed, but do not panic.
The NYC Department of Health and Mental Hygiene posted on social media Friday that it had not been notified of any New York City residents aboard the affected ship or exposed to the virus. Two New Jersey residents were flagged earlier in the week for possible exposure after contact with an infected traveler, according to the New Jersey Department of Health, but no equivalent cases have surfaced in the five boroughs.
How Andes Hantavirus Differs
The Andes strain is rare and primarily found in parts of South America, especially Argentina and Chile. Unlike most hantaviruses, which spread only through contact with infected rodents or their droppings, the Andes variant has shown limited person-to-person transmission, typically only in prolonged close-contact settings such as households or healthcare facilities.
Symptoms generally appear 4 to 42 days after exposure and can include fever, fatigue, muscle aches, headache, cough, and chest tightness. There is no specific antiviral treatment, and severe cases can require intensive care including intubation, fluid replacement, or extracorporeal membrane oxygenation.
Dr. Martin sought to draw a clear line between the new outbreak and the public’s familiarity with airborne respiratory viruses like COVID-19 and influenza. “I want to put folks at ease here because they’re probably thinking a lot about COVID. They’re probably thinking a lot about flu, and fundamentally, this virus does not act that way,” he said. “The human-to-human contact of Andes virus can happen, but it’s extremely rare. But it really only happens through prolonged personal contact with an infected person.”
The health department has issued formal guidance to NYC clinicians and hospitals, advising vigilance for symptoms in any patient with a recent travel history to affected regions.
Measles Resurfaces in Manhattan
Running parallel to the hantavirus advisory is a slower-burning concern: measles. As of May 8, NYC has confirmed six measles cases year-to-date, the department reported. All cases so far have been linked to international travel rather than community spread.
The most recent case involves an unvaccinated adult in Manhattan who tested positive after returning from abroad. City health officials have been working to notify individuals who may have been exposed at locations the patient visited, including two restaurants, a performance venue, and multiple healthcare facilities.
One of those restaurants, Norma, an Italian eatery in Hell’s Kitchen, has been publicly identified. The other businesses have not been disclosed by the city because each location has already independently notified its employees and patrons who may have been exposed, according to a department spokesperson.
Measles spreads through airborne transmission and is highly contagious. Symptoms typically begin 7 to 14 days after exposure and include fever, cough, runny nose, watery eyes, and the hallmark red rash that spreads from the face across the body. Two doses of the MMR vaccine are roughly 97% effective at preventing infection.
The World Cup Factor
With FIFA World Cup matches scheduled to begin in the New York region next month, the city is bracing for an influx of international visitors that could amplify imported infectious disease risk. Dr. Martin has urged New Yorkers, regardless of whether they plan to travel themselves, to confirm their MMR vaccination status and stay current on routine immunizations.
The health department recommends that infants ages 6 to 11 months traveling internationally receive an early, extra dose of MMR vaccine at least two weeks before departure. That dose does not replace the routine two-dose series that begins at 12 months.
For now, the city’s posture is one of calibrated vigilance: track the data, alert the public, and keep New Yorkers ready without alarming them.
