Portland Plans Alerts for Cruise Ship Outbreaks

Portland, Maine, public health officials are preparing a cruise-ship outbreak communications policy that would notify residents and downtown businesses when an arriving vessel has an infectious disease outbreak on board. The Portland Public Health Division presented the plan Tuesday to the City Council’s health and human services and public safety committee, though the protocol does not require council approval.

The proposal follows the October arrival of Oceania Insignia during a norovirus outbreak in which the U.S. Centers for Disease Control and Prevention listed 74 illnesses among 637 passengers, or 11.6%. Portland is scheduled for more than 80 cruise dockings from May 22 through early November.

“The goal of this new protocol is to outline the Portland Public Health Division’s plans in the event there’s an outbreak,” Bridget Rauscher, Portland’s public health director, said. “We want folks to have access to science-based information, but also we want to provide notifications that prevent unnecessary panic.”

City plans alerts and Old Port outreach

The city plans to use its website, municipal social media accounts and the nonprofit Portland Downtown to share notices when outbreak information is available for a ship calling in Portland. The division also plans broader seasonal education for residents and more targeted outreach to the downtown business community before and during the tourist season.

That business outreach is tied closely to Portland’s cruise geography. The city’s cruise operations are centered on Portland Ocean Terminal at Maine State Pier and Ocean Gateway Terminal, both on or near Commercial Street and within a short walk of Old Port restaurants, shops and waterfront attractions.

Rauscher said the education campaign will focus on basic disease-prevention practices for businesses, including frequent handwashing, surface cleaning, workers staying home when ill and improved ventilation. “When it’s nice out, maybe prop the front door open and open windows,” she said.

Under the CDC’s Vessel Sanitation Program, cruise ships report gastrointestinal illness cases, and the agency publicly posts outbreaks for ships under its jurisdiction when at least 3% of passengers or crew report symptoms. The CDC threshold is lower than the illness level reported aboard Insignia when the Oceania ship called in Portland last fall.

Advocates press for stronger measures

Portland Cruise Control, a local group that supports tighter limits on cruise ship calls, said the communications plan is useful but does not go far enough. JoAnn Locktov, the group’s co-founder, said the city should consider restrictions on disembarkation during major outbreaks and broader alerts, including notifications sent directly to mobile phones.

“We should have a ‘local residents-first’ philosophy,” Locktov said. She said residents and downtown workers need timely information so they can make decisions when a ship with illness on board arrives.

Matthew Day, another Portland Cruise Control co-founder, said the city lacks detailed docking or quarantine procedures for outbreak situations, including when the harbor master should deny entry or when a vessel should be quarantined. The group planned to meet with Portland’s new harbor master to discuss what role that office could play if a ship arrives with an outbreak.

Portland officials have framed the current effort as a public communications and prevention plan rather than a docking-control policy. Management of public disease outbreaks rests primarily with federal and state public health agencies, while the city’s proposal focuses on local notification and education.

Norovirus remains the main cruise concern

Norovirus and other gastrointestinal viruses are among the most common outbreak risks on cruise ships because passengers share dining rooms, entertainment spaces and other enclosed areas. CDC data cited by infectious-disease physician Dr. Michael Davis recorded 23 cruise-ship outbreaks in 2025, with norovirus identified in 18 of them.

The Portland discussion also follows an April hantavirus outbreak involving MV Hondius after the ship departed Argentina. That outbreak led to three deaths and additional positive tests, according to the CDC; hantavirus is generally linked to exposure to rodent urine, feces or saliva and is less readily transmissible than norovirus, though it can spread among people in close quarters.

During Tuesday’s committee discussion, councilors supported giving the public more information while avoiding alerts that could create unnecessary alarm. The division is seeking committee feedback before putting the protocol into use for the coming cruise season.