Hantavirus Symptoms: What to Know as Deadly Cruise Ship Outbreak Spreads Globally
A rare and potentially fatal virus has thrust hantavirus symptoms back into the headlines after a confirmed outbreak aboard a cruise ship in the Atlantic Ocean left multiple passengers dead and health authorities across several nations on high alert. Here is everything you need to know about recognizing hantavirus symptoms and understanding the disease's rapid progression.
What Is Hantavirus and Why Is It Dangerous Now
The World Health Organization confirmed that the type of hantavirus responsible for the current outbreak is the Andes virus, which can lead to hantavirus pulmonary syndrome (HPS), a severe and potentially deadly disease that affects the lungs.
Since April 11, three people connected to the cruise ship have died, while a handful of others remain ill. The outbreak was first reported to WHO on May 2 and remains a low risk to the general public.
Early Hantavirus Symptoms You Should Not Ignore
Early hantavirus symptoms include fatigue, fever, and muscle aches, especially in the large muscle groups — thighs, hips, back, and sometimes shoulders. These symptoms closely resemble the flu, making early identification particularly difficult.
About half of all people infected also experience headaches, dizziness, chills, and abdominal problems such as nausea, vomiting, diarrhea, and abdominal pain. Because hantavirus symptoms mirror common illnesses, many patients delay seeking critical care.
Late-Stage Hantavirus Symptoms and Lung Involvement
Four to ten days after the initial phase of illness, late hantavirus symptoms appear. These include coughing and shortness of breath, and patients may experience tightness in the chest as the lungs fill with fluid.
Hantavirus symptoms may develop rapidly, and early medical care is critical. HPS can cause breathing difficulties, and patients may need breathing support such as intubation — a procedure where a tube is placed in the lungs from the mouth to help the patient receive oxygen.
How Quickly Hantavirus Symptoms Appear After Exposure
In humans, hantavirus symptoms usually begin between one and eight weeks after exposure, depending on the type of virus, and typically include fever, headache, muscle aches and gastrointestinal symptoms such as abdominal pain, nausea or vomiting.
WHO advises passengers and crew connected to the current outbreak to remain vigilant for hantavirus symptoms for 45 days. The European Centre for Disease Prevention and Control considers everyone on the ship to be close contacts due to the closed setting and shared activities.
Hantavirus Symptoms vs. Other Diseases: Why Diagnosis Is Hard
Early diagnosis of hantavirus infection can be challenging because early hantavirus symptoms are common with other febrile or respiratory illnesses such as influenza, COVID-19, viral pneumonia, leptospirosis, dengue, or sepsis. A careful patient history is essential, with particular attention to possible rodent exposure, occupational risks, travel history, and contact with known cases.
Diagnosing hantavirus in a person infected less than 72 hours is difficult. If the initial test is done before the virus can be detected, repeat testing is often performed 72 hours after symptom onset.
What to Do If You Experience Hantavirus Symptoms
If you have been around rodents and experience hantavirus symptoms of fever, deep muscle aches, and severe shortness of breath, see a doctor immediately. Tell your doctor about any rodent exposure — this will alert the physician to look closely for rodent-carried diseases such as hantavirus.
There is no vaccine that prevents hantavirus and no specific treatment for it. Early supportive care and immediate referral to a facility with a complete ICU can improve survival. Roughly 38% of people who develop respiratory hantavirus symptoms may die from the disease. Acting fast when early warning signs appear remains the single most effective step any patient can take.
