Hantavirus
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40 free Hantavirus trivia questions with answers — science & nature quiz, new questions added Oct 2026.
Hantavirus is rare, but few infections have a stranger story. It hides in wild rodents for years without anyone noticing, then turns up in a mountain cabin, an army camp or a holiday destination and makes headlines everywhere. Most of us know the name and little else. This quiz collects the facts worth knowing: where the name comes from, which animals carry the virus on each continent, how it actually reaches humans, and what doctors can and cannot do about it. There are questions on the outbreaks of 1993, 2012 and 2026, on the scientists who tracked the virus down, and on the simple precautions that keep clearing out a shed or cabin safe. It suits curious readers, science students and anyone who followed the news and wondered how worried to be. Every answer comes with a short explanation, so you finish knowing more than when you started.
30 of 40 questions with answers and explanations. Play the quiz
Q 01Betsy Arakawa, who died of a hantavirus infection in New Mexico in 2025, was married to which Oscar-winning actor?
Gene Hackman
Gene Hackman outlived his wife by about a week at their Santa Fe home, dying of heart disease. Investigators first treated the two deaths as suspicious.
Q 02The Hantan, which gave hantaviruses their name after a fever struck soldiers nearby, is which kind of landmark?
A river
A river gave the whole virus family its name: about 3,200 troops stationed near the Hantan fell ill. Today it is a popular spot for white-water rafting.
Q 03Which name did the hantavirus behind a deadly 1993 US outbreak finally receive after three earlier names were rejected?
Sin Nombre virus
Sin Nombre virus is Spanish for virus without name, a way out after place names kept being rejected. One candidate, Muerto Canyon, recalled an 1805 massacre.
Q 04Which US national park closed 91 tent cabins in 2012 after hantavirus struck visitors staying in Curry Village?
Yosemite
Yosemite saw ten confirmed cases and three deaths, and the park warned thousands of earlier guests. One patient fell ill an unusually long 49 days after exposure.
Q 05Which hantavirus, behind the 2026 outbreak aboard MV Hondius, is the only one known to spread from person to person?
Andes virus
Andes virus can pass between people in close, sustained contact, which no other hantavirus is known to do. It usually reaches humans from rodents in Argentina and Chile.
Q 06Which small animal is the main carrier of the hantavirus behind the 1993 Four Corners outbreak?
Deer mouse
Deer mouse numbers had boomed just before the outbreak, and about 30% of those trapped at patient and control sites carried the virus.
Q 07Whose oral tradition recalled deadly outbreaks in 1918, 1933 and 1934, long before hantavirus hit the Four Corners?
The Navajo
The Navajo remembered those outbreaks, each of which fell in an unusually wet year when mice multiplied. Elders already advised keeping food away from mice.
Q 08During which war did about 3,200 United Nations soldiers catch the fever later traced to the first known hantavirus?
Korean War
The Korean War fever baffled doctors for decades, and the virus behind it was not isolated until 1978. Its discoverer went on to develop a vaccine too.
Q 09Seoul virus, a hantavirus found worldwide, spread to people in the US and Canada in 2017 through which animals?
Pet rats
Pet rats can carry Seoul virus because its natural hosts are ordinary brown and black rats. Laboratory colonies are screened for it for the same reason.
Q 10Health agencies warn against using a broom or which other household tool on mouse droppings where hantavirus circulates?
Vacuum cleaner
A vacuum cleaner stirs droppings into the air instead of removing them, just as dry sweeping does. The safe routine is to soak the mess first, then wipe it up wearing gloves.
Q 11A 2026 hantavirus outbreak linked to three deaths struck the Dutch-owned MV Hondius, which type of vessel?
Cruise ship
Cruise ship MV Hondius was on a polar expedition out of Argentina when people aboard fell ill. It waited three days at Cape Verde with nobody allowed ashore.
Q 12Which climate pattern brought the mild winter and wet spring that set up the 1993 Four Corners hantavirus outbreak?
El Niño
El Niño broke a drought of several years, so plants flourished and the local mouse population grew fast. More mice meant more contact with people.
Q 13Officials in the 1993 Four Corners hantavirus outbreak advised soaking mouse droppings in which household chemical?
Bleach
Q 21Which of the Four Corners states recorded no cases of hantavirus pulmonary syndrome during the 1993 outbreak?
Utah
Utah stayed clear in 1993, yet it holds the earliest confirmed case: a man who died there in 1959, identified decades later from stored tissue.
Q 22Puumala virus, Europe's most common hantavirus, takes its name from a municipality in which northern European country?
Finland
Finland supplied two candidate names, and Puumala won because Pieksämäki was judged too hard for English speakers to say. The country records 1,000 to 3,000 infections a year.
Q 23Which small woodland animal is the natural carrier of Puumala virus, the hantavirus behind most European cases?
Bank vole
Bleach inactivates the virus, and the soaked droppings were then to be sealed in double plastic bags. Heat does the job too: 60 °C for half an hour.
Q 14Old World hantaviruses in Europe and Asia cause a hemorrhagic fever whose hallmark is damage to which organs?
The kidneys
The kidneys swell and leak protein and blood into the urine, and severe cases need dialysis. Hantaviruses of the Americas mostly attack the lungs instead.
Q 15The first symptoms of hantavirus pulmonary syndrome (fever, headache, muscle aches) resemble which common infection?
Influenza
Influenza is what doctors first treated in the 1993 patient who exposed the outbreak: he was sent home with a flu drug. Breathing trouble follows days later.
Q 16How do most people catch hantavirus, a known risk when opening up mouse-infested sheds and cabins?
Inhaling contaminated dust
Inhaling contaminated dust is the usual route: dried urine, droppings and saliva from infected rodents turn into airborne particles. Bites and scratches can pass it on too, but far less often.
Q 17What does a hantavirus infection usually do to the wild rodents that carry and spread it?
No apparent illness
No apparent illness shows in the carriers, which stay infected and keep shedding virus in saliva, urine and droppings. In people the same viruses can kill within days.
Q 18Which group made up most victims of the 1993 Four Corners hantavirus outbreak, to the surprise of doctors?
Healthy young adults
Healthy young adults dying of sudden lung failure matched no known disease. Investigators at first suspected an environmental toxin or an unknown germ.
Q 19Much of the damage in severe hantavirus disease comes from an overreaction by which of the body's own systems?
The immune system
The immune system releases inflammatory signals that damage infected vessel linings, so tiny blood vessels leak and fluid pours into the lungs.
Q 20Which US agency's Special Pathogens Branch tied the 1993 Four Corners outbreak to a hantavirus within days?
The CDC
The CDC tested patients' antibodies against 25 different viruses and only hantaviruses reacted. Trappers then caught about 1,700 rodents to find the carrier.
Bank vole lung tissue yielded the virus in 1980, almost four decades after a wartime epidemic now linked to it sickened about a thousand soldiers.
Q 24The heavy blooming and seeding of which plant in Chile and Argentina triggers rodent booms that raise hantavirus risk?
Bamboo
Bamboo blooms are followed by surges in the small rodents that carry the region's main hantavirus, and human cases rise with them.
Q 25Around 10,000 Japanese soldiers caught a hantavirus fever during World War II while stationed in which occupied region?
Manchuria
Manchuria's outbreak was one of several wartime ones: soldiers living rough in camps and trenches share ground with the rodents that carry the virus.
Q 26Black Creek Canal virus, a hantavirus first isolated in Dade County in 1995, is named after a waterway in which state?
Florida
Florida's case proved hantavirus is not just a western problem. The patient, a 33-year-old from a semirural area, spent 12 days on a ventilator and went home in good condition.
Q 27Which everyday outdoor element helps inactivate hantavirus particles, much as household disinfectants do indoors?
Sunlight
Sunlight works because its ultraviolet rays inactivate the virus. Kept cold at 4 °C, the same particles can last more than 18 days.
Q 28Hantavirus infection typically causes a sharp drop in which blood component, an early clue for doctors?
Platelets
Platelets are diverted to virus-coated vessel walls, so too few remain in circulation. White blood cell counts, by contrast, go up.
Q 29Which way of killing mice did officials discourage in the 1993 Four Corners hantavirus outbreak?
Poison
Poison lets a mouse crawl off and die somewhere out of reach, where its body can still spread the virus. Trapping, with gloves and a mask, was the advice instead.
Q 30The patient whose death exposed the 1993 Four Corners hantavirus outbreak collapsed while travelling to which event?
His fiancée's funeral
His fiancée's funeral was the destination: she had died five days earlier with the same symptoms. A local investigator spotted the match and pushed for autopsies.