US Case Adds to Unusual Monkeypox Outbreak

Experts are scrambling to understand clusters of the normally rare disease that have been reported in Europe and North America in the last month.

Written byNatalia Mesa, PhD
| 4 min read
Transmission electron tomography of monkeypox virus
Register for free to listen to this article
Listen with Speechify
0:00
4:00
Share

Yesterday (May 18), the Centers for Disease Control confirmed that a man in Massachusetts was the first person in the United States to test positive for monkeypox. He had recently traveled to Canada, where he presumably contracted the virus, the Massachusetts Department of Health says in a statement. The case adds to the spate of infections detected at least five European countries and Canada, regions which are outside the disease’s typical stomping grounds.

The outbreak is “rare and unusual,” UK Health and Safety Authority Chief Medical Advisor Susan Hopkins says in a statement released on Monday after two additional UK denizens tested positive for the disease, adding that “exactly where and how they acquired their infections remains under urgent investigation.”

Monkeypox is a rare but potentially serious illness caused by the monkeypox virus, a relative of the smallpox virus (both are Orthopoxviruses and cause similar symptoms). The infection is characterized ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member? Login Here
Add The Scientist as a preferred source on Google

Add The Scientist as a preferred Google source to see more of our trusted coverage.

Related Topics

Meet the Author

  • A black and white headshot

    As she was completing her graduate thesis on the neuroscience of vision, Natalia found that she loved to talk to other people about how science impacts them. This passion led Natalia to take up writing and science communication, and she has contributed to outlets including Scientific American and the Broad Institute. Natalia completed her PhD in neuroscience at the University of Washington and graduated from Cornell University with a bachelor’s degree in biological sciences. She was previously an intern at The Scientist, and currently freelances from her home in Seattle. 

    View Full Profile
Share
Image of a man in a laboratory looking frustrated with his failed experiment.
February 2026

A Stubborn Gene, a Failed Experiment, and a New Path

When experiments refuse to cooperate, you try again and again. For Rafael Najmanovich, the setbacks ultimately pushed him in a new direction.

View this Issue
Human-Relevant In Vitro Models Enable Predictive Drug Discovery

Advancing Drug Discovery with Complex Human In Vitro Models

Stemcell Technologies
Redefining Immunology Through Advanced Technologies

Redefining Immunology Through Advanced Technologies

Ensuring Regulatory Compliance in AAV Manufacturing with Analytical Ultracentrifugation

Ensuring Regulatory Compliance in AAV Manufacturing with Analytical Ultracentrifugation

Beckman Coulter logo
Conceptual multicolored vector image of cancer research, depicting various biomedical approaches to cancer therapy

Maximizing Cancer Research Model Systems

bioxcell

Products

Sino Biological Logo

Sino Biological Pioneers Life Sciences Innovation with High-Quality Bioreagents on Inside Business Today with Bill and Guiliana Rancic

Sino Biological Logo

Sino Biological Expands Research Reagent Portfolio to Support Global Nipah Virus Vaccine and Diagnostic Development

Beckman Coulter

Beckman Coulter Life Sciences Partners with Automata to Accelerate AI-Ready Laboratory Automation

Graphic of amino acid chains folded into proteins

Expi293™ PRO Expression System: Higher Yields Across a Wider Variety of Proteins

Thermo Fisher Logo