{"id":27065,"date":"2026-05-17T08:02:18","date_gmt":"2026-05-17T08:02:18","guid":{"rendered":"https:\/\/readtrends.com\/en\/no-andes-hantavirus-us-mv-hondius\/"},"modified":"2026-05-17T08:02:18","modified_gmt":"2026-05-17T08:02:18","slug":"no-andes-hantavirus-us-mv-hondius","status":"publish","type":"post","link":"https:\/\/readtrends.com\/en\/no-andes-hantavirus-us-mv-hondius\/","title":{"rendered":"No Andes Hantavirus Cases in U.S. After MV Hondius Outbreak"},"content":{"rendered":"<article>\n<p>Federal health officials said on May 15, 2026, that no cases of the Andes hantavirus have been confirmed in the United States after an outbreak linked to the MV Hondius cruise ship. The ship tally stands at 10 confirmed or probable hantavirus cases, including two confirmed deaths and one suspected death. Eighteen American passengers from the voyage were transferred to the University of Nebraska Medical Center quarantine unit for monitoring; officials said some test results and passenger counts have been updated since initial briefings. U.S. authorities are prioritizing targeted testing of symptomatic people and close contacts while declining to release individual clinical details to protect privacy.<\/p>\n<h2>Key Takeaways<\/h2>\n<ul>\n<li>As of May 15, 2026, the MV Hondius outbreak count is 10 confirmed or probable hantavirus cases, with two confirmed fatalities and one suspected fatality.<\/li>\n<li>The CDC stated there are no confirmed Andes hantavirus cases in the U.S.; testing is focused on symptomatic individuals and those with high-risk exposure.<\/li>\n<li>Eighteen American passengers were moved to the University of Nebraska Medical Center (UNMC) quarantine unit, although officials have referenced a figure of 16 passengers in some briefings.<\/li>\n<li>One American physician initially tested positive but later tested negative after additional laboratory analysis and was moved to the quarantine unit for monitoring.<\/li>\n<li>Ontario County (New York) is investigating a suspected locally acquired hantavirus case in a student; health officials say it is not linked to the cruise ship and poses no risk to the general public.<\/li>\n<li>The Andes virus subtype is primarily found in South America and can, in rare cases, transmit person-to-person through prolonged close contact; no vaccines are currently licensed for the Andes virus.<\/li>\n<li>U.S. hantavirus infections remain rare and are most often associated with rodent exposures rather than human-to-human spread.<\/li>\n<\/ul>\n<h2>Background<\/h2>\n<p>Hantaviruses are a family of rodent-borne viruses that can cause severe respiratory and systemic illness in humans. In North America, hantavirus pulmonary syndrome (HPS) cases have historically been linked to rodent exposure\u2014typically inhalation of aerosolized urine, droppings or nesting materials from infected rodents. The Andes virus, by contrast, has been documented chiefly in parts of South America and is notable for a small number of person-to-person transmission events following close, prolonged contact.<\/p>\n<p>Recent years have seen sporadic, geographically scattered hantavirus cases in the United States, concentrated in states such as California, Colorado, New Mexico and Arizona. Public health agencies monitor hantavirus infections through case reporting, laboratory testing and targeted contact tracing when human-to-human spread is suspected. Cruise-ship clusters are unusual for hantavirus and prompted heightened international and domestic public-health coordination after patients from the MV Hondius required medical evacuation and quarantine.<\/p>\n<h2>Main Event<\/h2>\n<p>The MV Hondius outbreak came to public attention in mid-May 2026 when passengers and crew developed febrile and respiratory symptoms during or after the voyage. By May 15, health authorities reported a combined total of 10 confirmed or probable cases associated with the ship; two deaths were confirmed and one death remained suspected to be due to hantavirus. U.S. citizens who had been aboard were repatriated and placed under medical observation at specialized containment and quarantine facilities.<\/p>\n<p>On May 15, CDC incident manager Dr. David Fitter told a briefing that no Andes hantavirus infections had been confirmed in the United States and that the strain requires prolonged, close exposure to transmit between people. The CDC advised testing only symptomatic individuals or those with clearly defined high-risk exposures \u2014 a definition that included passengers who remained on the ship between May 5 and May 10 and anyone who had prolonged close contact with a confirmed Andes case.<\/p>\n<p>An American physician who initially tested positive for hantavirus later produced negative confirmatory results, and clinicians treating him characterized the first result as likely a false positive. That clinician reported feeling well and was transferred from a biocontainment admission to the quarantine unit for continued observation. Meanwhile, local public-health units, including Ontario County in New York, investigated unrelated suspected cases and emphasized the rarity of human-to-human spread for U.S. hantavirus strains.<\/p>\n<h2>Analysis &#038; Implications<\/h2>\n<p>The immediate public-health implication is heightened surveillance and targeted testing rather than broad population-level screening. Because Andes virus transmission between humans appears to require intense, prolonged exposure, public-health responses prioritize identifying close contacts and isolating symptomatic people. This targeted approach conserves testing resources and reduces unnecessary alarm while still addressing plausible transmission chains from the cruise cluster.<\/p>\n<p>Laboratory testing complexity is a second important factor. Initial positive results that are later reversed underscore the need for confirmatory assays and careful interpretation, particularly when dealing with a rare pathogen and high public anxiety. False positives can prompt intensive containment measures, so coordination between clinical laboratories and reference centers is essential to validate unexpected results and inform quarantine decisions.<\/p>\n<p>For travel and maritime operations, the outbreak highlights gaps in onboard infection control for unusual pathogens and the logistics of medically evacuating passengers. Cruise operators, ports and national authorities will likely re-evaluate screening, reporting and on-board isolation procedures for febrile respiratory illnesses to reduce the time between symptom onset and containment. Internationally, the event may also prompt South American and global health authorities to review surveillance for Andes virus and cross-border case definitions.<\/p>\n<h2>Comparison &#038; Data<\/h2>\n<figure>\n<table>\n<thead>\n<tr>\n<th>Metric<\/th>\n<th>Count<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Confirmed\/probable cases linked to MV Hondius<\/td>\n<td>10<\/td>\n<\/tr>\n<tr>\n<td>Confirmed deaths<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>Suspected additional death<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>U.S. passengers moved to UNMC quarantine<\/td>\n<td>18 (some briefings cite 16)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p>The data above reflect counts reported by health authorities as of May 15, 2026. The discrepancy between 18 and 16 U.S. passengers cited in different briefings appears in official statements; that variance affects operational planning for quarantine beds and contact tracing workloads. Historically, the U.S. records only a handful of hantavirus cases annually, and the bulk are tied to rodent exposures rather than outbreaks onboard ships.<\/p>\n<h2>Reactions &#038; Quotes<\/h2>\n<p>Public-health officials emphasized targeted testing and quarantine measures while cautioning against public alarm.<\/p>\n<blockquote>\n<p>&#8220;No Andes hantavirus cases have been confirmed in the United States; we are focusing testing on symptomatic individuals and those with defined high-risk exposure,&#8221;<\/p>\n<p><cite>Dr. David Fitter, CDC incident manager (official briefing, May 15, 2026)<\/cite><\/p><\/blockquote>\n<p>Clinical staff described the testing reversal for an American physician and the resulting reassurance for the patient and team.<\/p>\n<blockquote>\n<p>&#8220;Further testing shows no evidence that I have had hantavirus,&#8221;<\/p>\n<p><cite>Dr. Stephen Kornfeld (patient statement to media)<\/cite><\/p><\/blockquote>\n<p>Local health authorities stressed that the suspected school case in New York was being investigated as locally acquired but not connected to the cruise ship cluster.<\/p>\n<blockquote>\n<p>&#8220;There is no risk to the general public from the Geneva High School investigation; local strains in the U.S. typically do not spread person-to-person,&#8221;<\/p>\n<p><cite>Ontario County Department of Health (public statement)<\/cite><\/p><\/blockquote>\n<aside>\n<details>\n<summary>Explainer: What is Andes hantavirus and how it spreads<\/summary>\n<p>Andes hantavirus is a subtype of orthohantavirus mostly found in parts of Argentina, Chile and neighboring countries. Unlike the more typical North American hantaviruses, Andes has documented rare person-to-person transmission after prolonged, close contact. Infection commonly follows exposure to rodent excreta or, in the Andes subtype, direct close contact with an infected patient. Clinical presentation can include fever, muscle aches and rapidly progressive respiratory distress; severe cases may require intensive care. There are no vaccines currently licensed specifically against Andes virus, and treatment is principally supportive, relying on early detection and critical-care interventions when needed.<\/p>\n<\/details>\n<\/aside>\n<h2>Unconfirmed<\/h2>\n<ul>\n<li>Causation links: The precise transmission routes for all MV Hondius cases remain under investigation; sequencing to confirm Andes virus in each case has not been publicly detailed.<\/li>\n<li>Passenger counts: Official briefings have alternately cited 16 and 18 U.S. passengers in quarantine, and agencies have not reconciled the discrepancy in public statements.<\/li>\n<li>Origin of initial positive result: The laboratory basis for the physician&#8217;s first positive test and the assays used in confirmation have not been fully disclosed in public briefings.<\/li>\n<\/ul>\n<h2>Bottom Line<\/h2>\n<p>The MV Hondius episode has intensified surveillance for a rare but serious hantavirus subtype, yet federal officials maintain there are no confirmed Andes virus infections in the United States as of May 15, 2026. Public-health action is focused, pragmatic and proportional: test symptomatic patients, monitor close contacts, and use quarantine where exposure risk is high. The situation underscores the importance of rapid laboratory confirmation, clear communication about case counts, and careful contact tracing to avoid both under- and overreaction.<\/p>\n<p>For travelers and pet owners, routine precautions are still appropriate: avoid rodent-infested areas, take care when cleaning potentially contaminated spaces, and follow public-health guidance if you had prolonged close contact with a symptomatic person from the affected voyage. Authorities will continue to publish updates as testing, genetic sequencing and epidemiologic investigations yield more definitive answers.<\/p>\n<h2>Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/abc7.com\/live-updates\/hantavirus-infection-outbreak-cruise-ship-symptoms-map\/19064881\/\" target=\"_blank\" rel=\"noopener\">ABC7 Los Angeles<\/a> \u2014 News outlet reporting MV Hondius developments and local health statements.<\/li>\n<li><a href=\"https:\/\/www.cdc.gov\/hantavirus\/\" target=\"_blank\" rel=\"noopener\">U.S. Centers for Disease Control and Prevention (CDC)<\/a> \u2014 Official public health agency guidance and outbreak briefings.<\/li>\n<li><a href=\"https:\/\/www.who.int\/news-room\/fact-sheets\/detail\/hantavirus\" target=\"_blank\" rel=\"noopener\">World Health Organization (WHO)<\/a> \u2014 International health agency summary on hantavirus transmission and prevention.<\/li>\n<\/ul>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>Federal health officials said on May 15, 2026, that no cases of the Andes hantavirus have been confirmed in the United States after an outbreak linked to the MV Hondius cruise ship. The ship tally stands at 10 confirmed or probable hantavirus cases, including two confirmed deaths and one suspected death. Eighteen American passengers from &#8230; <a title=\"No Andes Hantavirus Cases in U.S. After MV Hondius Outbreak\" class=\"read-more\" href=\"https:\/\/readtrends.com\/en\/no-andes-hantavirus-us-mv-hondius\/\" aria-label=\"Read more about No Andes Hantavirus Cases in U.S. After MV Hondius Outbreak\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":27064,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"No Andes Hantavirus Cases in U.S. \u2014 NewsLab","rank_math_description":"Following an MV Hondius cruise outbreak on May 15, 2026, U.S. officials say no confirmed Andes hantavirus cases; 10 ship-linked cases, two confirmed deaths, and American passengers are under quarantine.","rank_math_focus_keyword":"hantavirus,Andes virus,MV Hondius,University of Nebraska Medical Center,CDC","footnotes":""},"categories":[2],"tags":[],"class_list":["post-27065","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-top-stories"],"_links":{"self":[{"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/posts\/27065","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/comments?post=27065"}],"version-history":[{"count":0,"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/posts\/27065\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/media\/27064"}],"wp:attachment":[{"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/media?parent=27065"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/categories?post=27065"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/readtrends.com\/en\/wp-json\/wp\/v2\/tags?post=27065"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}