Explore this hantavirus cruise ship outbreak case map from May 2026

Watch an expert's take on the rare disease hantavirus—and why it's not of great concern to the general population

This rare zoonotic disease, transmitted to humans primarily through infected rodent droppings, urine, or saliva, is rarely spread between people. The disease was of particular concern in spring 2026, when an outbreak occurred on a 150-person cruise ship, prompting a flurry of action, including contact tracing for passengers in their home countries. The disease can be fatal. But early care—primarily oxygen support—can help patients survive.

There were 23 reported cruise ship outbreaks of gastrointestinal illness in 2025—something that happens often enough that there's a whole program at the US CDC devoted to tracking them.

Track every cruise ship in real time, with itineraries and accident history

CruiseMapper is a live global tracker covering hundreds of vessels across major cruise lines. The site layers in port schedules, cabin-level deck plans, repositioning voyages, and a searchable database of 15 incident types—fires, groundings, virus outbreaks, drug smuggling, passenger deaths, and more.

In 2012, a virus that causes HFMD may have killed dozens of kids in Asia

More than 50 young children in Cambodia died in spring 2012 for unknown reasons, but laboratory testing of samples available from a limited number of those children came back positive for Enterovirus 71. That virus, which can cause HFMD, is known to cause severe complications among some people who contract the disease. But health officials concluded that poor baseline health and then incorrect treatment using steroids helped exacerbate their condition, helping lead to the deaths.

Discover the latest information on US measles cases from official outbreak tracking figures.

Explore a database of more than 220,000 shipwrecks, the largest compilation to date.

Explore this interactive visualization of illnesses known to jump from animals to people, and learn how these zoonotic diseases spread.

See when the last case of wild poliovirus was found in each country

This chart shows when wild polio cases were last reported in each country worldwide. Beyond wild poliovirus, rare outbreaks can occur related to mutated strains of oral polio vaccine.

CDC does not require docs to report hand, foot, and mouth cases which makes tracking difficult

Mid-Atlantic states saw a surge of hand, foot, and mouth disease in 2025 for as-yet unknown reasons. Virginia, Maryland, and New Jersey, reported elevated outbreak numbers in 2025 as compared to other recent years, but since the US Centers for Disease Control and Prevention does not require mandatory reporting of positive HFMD cases—unlike strictly notifiable diseases like measles—it's hard to truly know the extent of the outbreaks and how significant the caseload is as compared to prior years across the region or country.

Mosquito-borne illnesses have killed two captive orcas at SeaWorld since they became water park attractions.

HFMD was first reported in 1957 in New Zealand

The first clinical report involved eight kids with the characteristic sores in New Zealand, and then in the years that followed there were dozens more cases there and also reports of outbreaks in England and Scotland, among other settings, including the US.

Our World in Data's COVID-19 tracker, with global case, death, and vaccination data for every country, though updates to the dataset ended in 2024.

See Virginia's spike in HFMD cases in 2025

The state's own tracking showed a significant jump in HFMD cases in July 2025 as compared to the prior few years, and that more people were visiting the emergency room and urgent care centers for the disease, but epidemiologists could not explain why the numbers were so high.

Historians estimate that only 1% of shipwrecks have been discovered.

Mapping the spread of a dangerous fungus growing in US healthcare facilities

Explore the data showing how the fungus C. auris has spread in the US, with more than 10,000 reported cases since 2016. Recommended steps to prevent infections and limit their spread have been successful in some areas, but infection control remains complicated because the fungus is often now multidrug-resistant.

Adults usually have some immunity to HFM Disease—but can still spread it

In 2025, certain eastern states including Virginia and West Virginia reported a sizable uptick in their HFMD cases, particularly in their schools and daycare centers, though the reason for the larger outbreaks remains unknown. When adults or teens get the disease, their symptoms are usually mild or even asymptomatic. Still, they may pass the disease between people, too. (Some users may encounter a paywall.)

Explore an interactive time-lapse of reported tsunami events since 1850, with identified cause, recorded observations, known deaths, and other information available for each.

Advanced forensic science has helped identify killed sailors decades later

When the USS Oklahoma capsized amid the attacks, hundreds of sailors were buried within the ship's hull. Officials have used advances in forensic science to analyze DNA and dental evidence to help identify nearly 400 sailors decades after the fact.

The floating homes of Holland

Floating communities like Schoonschip in Amsterdam are offering a novel approach to combat climate change-induced flooding. With sea levels rising and storms becoming more intense, these floating neighborhoods are providing a sustainable flood defense solution. Learn how they work here.

Explore an interactive map of volcanoes, earthquakes, and tsunamis from 2150 BCE to the present.

Researchers discover a massive Lake Superior shipwreck

A 292-foot Whaleback ship, Barge 129, was found in Lake Superior 120 years after a storm sank it, the Great Lakes Shipwreck Historical Society said.

The Dokos shipwreck, the oldest discovered to date, is more than 4,000 years old

Many of the oldest shipwrecks yet discovered sank during the late Bronze Age as Mediterranean trade networks began to flourish. This video explores the nine oldest wreckage sites, topped by the wreck off the Greek island of Dokos.

10 locally acquired malaria cases were reported in the US in 2023—a surprise

The cases, reported in Florida, Texas, Maryland, and Arkansas, broke a 20-year streak since there had been no reported locally acquired mosquito-transmitted malaria in the country since 2003, when there was a case in Florida.

Explore an interactive map of WWII shipwrecks.

Iceland, the last mosquito-free country, detected them in 2025.

More than 4,000 people died from cholera in 2023

This global health threat sickened more than half a million people in 2023 and killed 4,007 people. That's a 71% increase in deaths as compared to a year earlier. (Report only offered in PDF format.)

Climate change is influencing the spread of disease

Rising temperatures and water levels are forcing animals and pathogens beyond their typical boundaries. This article and its data visualizations explore the proliferation of climate-driven diseases.

Vector-borne diseases kill more than 700,000 people globally each year—and are growing

The diseases with the greatest potential to spread widely aren't the ones that quickly kill human hosts. Instead, the best hosts or reservoirs for vector-borne diseases would be chronically ill over the long term, increasing the likelihood that the pathogen could be transmitted to others.

On a cruise ship, the average person uses about 50 gallons of water a day, which is treated by bacteria and onboard filtration systems, then stored until the ship can legally discharge the wastewater.

See the real-time numbers of ships traversing the canal each day

This platform uses satellite data to track chokepoints and trade disruptions along the shipping lanes that crisscross the globe. Search for data from more than 1,600 ports, or run the climate scenario simulator.

The wonderfully named Vibrio diabolicus is a cousin of the cholera-causing bacterium

This bacterium, which belongs to the same genus as the cholera bacterium, was initially isolated from deep-sea hydrothermal fields. It was sampled from water that was scooped up during a French-American cruise in October 1991.

A timeline of major pandemics from 1899–2025

Modern pandemics have been defined by the race between globalization (which increases risk) and the development of new medicines. The Great Influenza epidemic claimed some 50 million lives, and the COVID-19 pandemic killed more than 7 million. In between, diseases like Ebola, cholera, AIDS, and more have devastated communities.

The US military, concerned about potential deployments worldwide, has long funded experimental hantavirus vaccines and therapies.

Collaborations between the military, biotech, and academic researchers led to an experimental antibody treatment for the Andes hantavirus strain—the one that more readily passes between humans. As of spring 2026, it had only been tested in animals. The US Army has also tested a potential hantavirus vaccine in people. It published early findings in 2023 that seemed promising, eliciting some immune system response. (Some users may encounter a paywall.)

Mapping Michigan's shipwrecks

For centuries, the Great Lakes have provided vital access to the Midwest from the Atlantic Ocean, allowing the establishment of key trading outposts and ultimately the growth of major cities in the region. An estimated 6,000 vessels were lost on the Great Lakes with approximately 1,500 of these ships located in Michigan waters. Explore the deadly legacy of the region with resources pulled together by the Michigan History Center.

Measles reached global transmission during the 15th- and 16th-century Columbian exchange

Devastating diseases like smallpox, influenza, measles, and other viruses were largely introduced into the Western Hemisphere beginning with the 1492 arrival of Christopher Columbus and the ensuing age of exploration.

Environmental conditions, shifting immunity, and viral strain could help explain 2025 spike

The surge in HFMD in the summer and early fall of 2025 in the mid-Atlantic could be the result of a confluence of factors, including a more virulent strain of disease-causing virus, good environmental conditions for the virus to spread—hot, humd—and a potential immunity gap among kids due to milder HFMD outbreaks the previous year.

A Canadian tourism campaign turns every whale sighting—including ones from decades ago—into a live, crowdsourced migration biography

Humpback flukes (or tails) are as individually distinct as fingerprints, which means a single photo is enough to match a whale to its full sighting history. Every upload adds a chapter (the database goes back to the 1970s) and the site uses AI to render that data as narrative, not just data.

HFMD symptoms typically begin to show up 3-6 days after exposure

Fever is often the first symptom and then painful sores may develop a day or two later. Coxsackie A16 is currently the most common enterovirus that leads to the disease, though there are several other enteroviruses that can cause it as well.

Marburg virus, related to Ebola, is also extremely deadly, and has no available vaccine.

Mapping the known ports involved in the trans-Atlantic slave trade

Based on historical logs, this interactive maps shows info from various ports of departure and arrival during the height of the trans-Atlantic slave trade.

Mapping the Tongan eruption impact

A team of scientists—with the help of an uncrewed boat remotely controlled from the UK—join forces to produce one of the clearest pictures to date of what took place underneath the water as an enormous volcano erupted near the Tongan mainland.

Powassan virus, a rare tick-borne disease named after the Canadian town where it was discovered in 1958, is on the rise in the northeastern United States, and it kills roughly 10% to 15% of patients with symptomatic disease.

One in five 16th century Spanish ships sank while crossing the Atlantic

Despite the incredibly high rate of catastrophic wrecks, during the Age of Exploration Spanish investors continued to fund voyages. Here, economists break down the incentives that led to increased risk, including short travel seasons and the propensity to overload ships.

See MS prevalence by region in the United States

This map underscores that people in the northeastern United States have more cases of the disease as compared to the south, west, and midwest. On an individual level, these numbers may still differ based on genetic makeup and other factors irrespective of where people live.

A look at the 2025 measles outbreak in West Texas and surrounding areas

A measles outbreak in the summer of 2025 ultimately led to more than 900 cases and the deaths of two young children. The highly contagious virus requires vaccination rates near 95% to achieve herd immunity—the Texas outbreak spread through areas of significant mistrust of vaccines, including the area’s Mennonite community.

Historically, cholera has repeatedly disrupted the Hajj for Muslims

Outbreaks of the disease throughout the 19th century and the beginning of the 20th, killed thousands of religious pilgrims as they sought to complete this obligatory pilgrimage.

Check out hurricane history where you live

The NOAA's historical hurricane tracker lets you explore over 150 years of data to see where hurricanes traveled and made landfall. The tool lets you search by location, name, or year; create maps and tables; and read NOAA storm reports.

Deadliest maritime disaster

In the final months of World War II, 75 years ago, German citizens and soldiers fleeing the Soviet army died when the “Wilhelm Gustloff” sank

Interactive human migration map

Using archeological, genetic, and climate data, scientists have pieced together an outline of the human odyssey—the journey that took our species from Africa to all corners of the globe. Experience this 200,000-year migration using an interactive human migration map.

The fatal allure of the Andrea Doria

The SS Andrea Doria was a luxury ocean liner that sank in 1956 after colliding with the Swedish passenger liner MS Stockholm. The sinking of the Andrea Doria was one of the most famous maritime disasters of the 20th century, and it resulted in the...