Connecticut, Maine, Massachusetts, New Jersey, New York State, Pennsylvania, Rhode Island and New York City have formed the Northeast Public Health Collaborative. The collaborative will issue their own vaccine recommendations and coordinate public health efforts.

Multiple independent sources from September 2025 confirm that a coalition of Northeastern states has formed a public health collaborative focused on vaccine guidance and coordination. The coalition includes Connecticut, Maine, Massachusetts, New Jersey, New York State, Pennsylvania, Rhode Island, and New York City. This group aims to develop vaccine recommendations that may be independent from federal CDC guidance and to coordinate regional public health strategies.

The collaborative was reportedly initiated in early 2025 and publicly announced around September 2025. Some sources mention additional states like Delaware participating or communicating with the group, while New Hampshire notably is not part of this coalition. The collaborative's formation is part of a broader trend of regional alliances responding to shifts in federal vaccine policy.

However, the exact scope of their authority and the details of their vaccine recommendation process are still emerging. There is no indication that the collaborative fully replaces federal guidance but rather supplements or offers regional coordination.