Hantavirus

The outbreak first occurred on the MV Hondius cruise ship in the Atlantic Ocean on May 2, 2026 due to inhalation of virus particles aerosolized from the saliva, urine, or droppings of infected wild rodents, particularly deer mice. As of May 4, 2026, 7 cases of hantavirus have been identified, including 3 deaths, one critically ill patient, and 3 individuals reporting mild symptoms ("Hantavirus cluster", 2026). Public health authorities are particularly concerned about this outbreak because while humans can usually only get hantavirus from being in contact with contaminated particles from rodents, this outbreak involves the Andes strain, which can spread between humans, although rare. When infected with this particular strain, it can cause a life-threatening condition called Hantavirus Pulmonary Syndrome (HPS) ("Questions", 2026). 

Hantavirus is a virus that can cause disease in humans. It can be contracted via contact with rodents like rats and mice, especially when exposed to their urine, feces, and saliva. It can also be spread through a bite or scratch by a rodent, although rare. There are two types of hantavirus:

• Hantavirus pulmonary syndrome (HPS) is more prevalent in the Western Hemisphere.

• Hemorrhagic fever with renal syndrome (HFRS) is a group of similar illnesses caused by hantaviruses and is more prevalent in Europe and Asia ("About hantavirus", 2024).

Hantavirus pulmonary syndrome (HPS) is a severe and potentially deadly disease that affects the lungs. Symptoms usually start to show 1 to 8 weeks after contact with an infected rodent. Symptoms may include:

• Fatigue

• Fever

• Muscle aches

• Headaches

• Dizziness

• Chills

• Abdominal problems

• Coughing

• Shortness of breath

Hemorrhagic fever with renal syndrome (HFRS) is a severe and sometimes deadly disease that affects the kidneys. Symptoms usually start to show 1 to 2 weeks after exposure. Symptoms may include:

• Intense headaches

• Back and abdominal pain

• fever/chills

• Nausea

• Blurred vision

• Flushed face

• Inflammation or redness of the eyes

• Rash

• Low blood pressure

• Lack of blood flow

• Internal bleeding

• Acute kidney failure ("About hantavirus", 2024)

With so many news anchors and TikTok videos overwhelming us with information, it may be scary to think about. However, don’t fret! There are many ways to reduce your risk of hantavirus. Try to minimize contact with rodents in your home, workplace, or campsite. If necessary, seal holes and gaps in your home or garage to keep rodents out, and place traps in and around your home to decrease rodent infestation. Moreover, ensure that you clean up any food that may attract rodents and are easy to access by rodents ("About hantavirus", 2024).

Misinformation online has led many users to believe that this outbreak is the start of a new pandemic. Conspiracy theories about vaccines and another lockdown similar to quarantine during COVID-19 has been surfacing on social media. However, there has been no official discussion of lockdowns and vaccines. Moreover, public health experts say that this outbreak poses far less of a threat than COVID-19, which killed over 7 million people worldwide ("The hantavirus", 2026). Unlike COVID-19, human-to-human transmission of hantavirus is rare and requires prolonged close contact. Therefore, it is not considered a pandemic threat. Public health measures, such as monitoring, isolation, contact tracing, and infection prevention and control procedures, are being implemented in all countries to reduce the likelihood of further spread ("Questions", 2026).

There is currently no cure or vaccine, but preventative measures can be taken to minimize your risk for hantavirus. Moreover, treatment for relieving the symptoms is available, including breath support for HPS patients and the removal of toxins from the blood of HFRS patients ("About hantavirus", 2024). Early supportive care and immediate referral to a facility with a complete ICU can improve survival ("Hantavirus cluster", 2026).

With the rise of a new outbreak, it is important to stay calm and not believe everything you see on social media. Furthermore, communities and individuals should initiate preventative measures to reduce their risk of hantavirus. If you suspect you have hantavirus or have been in contact with a person who tested positive for hantavirus, contact your local public health authorities. From there, they will be able to give you advice based on your risk level ("Questions", 2026).

---

Works Cited:

Centers for Disease Control and Prevention. (2024, May 13). About hantavirus. Centers for Disease Control and Prevention. https://www.cdc.gov/hantavirus/about/index.html

NYT: The hantavirus outbreak is resurrecting covid-era misinformation tactics. University of Nebraska Medical Center. (2026, May 13). https://www.unmc.edu/healthsecurity/transmission/2026/05/13/the-hantavirus-outbreak-is-resurrecting-covid-era-misinformation-tactics/

Questions and answers on the hantavirus outbreak in a cruise ship. European Centre for Disease Prevention and Control. (2026, May 20). https://www.ecdc.europa.eu/en/infectious-disease-topics/hantavirus-infection/surveillance-and-updates/questions-answers-outbreak

World Health Organization. (2026, May 4). Hantavirus cluster linked to cruise ship travel, multi-country. World Health Organization. https://www.who.int/emergencies/disease-outbreak-news/item/2026-DON599