What a Norovirus Outbreak Costs
Ask what a norovirus outbreak costs and the answer you get is a "foodborne illness" figure from a 2018 restaurant model — a good number, but not a norovirus number and not a cruise-ship, nursing-home or school number. Those figures can be built from public sources: the cost of one illness, the size of an average outbreak in each setting, and the handful of organisations that have actually disclosed what an outbreak cost them. This page does the arithmetic in the open.
The short version
One norovirus illness costs society about $505–$558 (Bartsch 2020's $10.6 billion a year ÷ CDC's 19–21 million illnesses; USDA ERS says $543 for a foodborne case). An average reported outbreak is 22 illnesses (CDC NORS, 2009–2019), so about $11,000–$12,300 before anyone counts the setting's own costs. Those are what change the answer: a restaurant outbreak in the published model runs from $3,911 to $2.58 million; a hospital outbreak at Johns Hopkins cost $657,644 (about $1.17 million today); an average nursing-home outbreak is 32 cases with most of a hospitalization attached; and Chipotle's 2016 profit was $452.7 million lower than 2015's after norovirus and E. coli incidents, plus a $25 million criminal fine. Cruise lines disclose nothing.
The number Google gives you, and what it actually says
The figure that surfaces for almost any "outbreak cost" search is from Bartsch, Asti, Nyathi, Spiker and Lee at Johns Hopkins, in Public Health Reports in 2018: a single foodborne illness outbreak costs a restaurant "$3,968 to $1.9 million for a fast-food restaurant … $8,273 to $2.6 million for a fine-dining restaurant". It is a computational simulation — outbreak sizes from 5 to 250 people, 15 pathogens, four kinds of restaurant, and scenarios from no consequences at all to 100 lost meals per illness, a $100,000 fine and $1,656,569 in lawsuits and legal fees. It is a legitimate baseline, and it has two properties worth knowing before it is quoted as the answer.
First, the pathogen hardly matters. Across all 15, the germ changed the cost by at most $337,000 — the gap between Bacillus cereus and listeria — and comparing the two commonest causes, "a single salmonella outbreak cost $63–$21,198 more than a norovirus outbreak under the same conditions", because salmonella hospitalises more people (Bartsch et al. 2018). The cost of a restaurant outbreak is made of outbreak size, lost custom and lawyers, and norovirus, which sends about 1% of its victims to hospital and lasts one to three days, sits at the cheap end of every column.
Second, the paper does publish norovirus columns — they just are not the ones quoted. Here they are.
| Restaurant type | 5 ill, very low impact | 250 ill, very low impact | 5 ill, high impact | 250 ill, high impact |
|---|---|---|---|---|
| Fast food | $3,911 | $5,775 | $1,768,077 | $1,912,716 |
| Fast casual | $6,243 | $8,233 | $1,773,305 | $2,058,188 |
| Casual dining | $7,935 | $9,932 | $1,777,168 | $2,168,054 |
| Fine dining | $8,177 | $10,177 | $1,785,739 | $2,584,733 |
Read across a row and the lesson is stark: going from five ill customers to 250 adds a few thousand dollars, while going from "nobody sues" to "somebody sues" adds $1.7 million (Bartsch et al. 2018, Table 3). A norovirus outbreak is cheap unless it becomes news or a lawsuit — and norovirus outbreaks are the ones that become news, because they are large. That is what the model cannot show and the next sections can.
What one illness costs
Every per-outbreak figure below starts from a per-illness figure, so here is where those come from.
| Measure | Arithmetic | Cost per illness | Source |
|---|---|---|---|
| Societal cost, all US illnesses (89% lost productivity, 11% medical) | $10.6 billion ÷ 21 million; ÷ 19 million | $505 – $558 | Bartsch et al., J Infect Dis 2020; CDC illness estimate |
| Foodborne norovirus, all cost components (2023 dollars) | $2,968,300,000 ÷ 5,461,731 cases | $543 | USDA Economic Research Service, 2025 update |
| Medical cost when care is sought — outpatient / emergency department / inpatient (2024 dollars) | Medians of 3,520 / 2,018 / 2,230 VHA episodes | $640 / $2,203 / $14,083 | Cates et al., JAMA Netw Open 2025 |
| Inpatient cost by age, VHA (2024 dollars) | Medians: 18–24, 25–44, 45–64, 65–84, ≥85 | $7,751 / $9,394 / $12,777 / $16,075 / $18,566 | Cates et al. 2025 |
The medical rows explain why setting matters so much. In a school, almost nobody is hospitalised; in a nursing home, one case in fifty is, and the median inpatient cost for someone over 85 is $18,566. The same 30-person outbreak is a different bill depending on who the 30 people are.
Per outbreak, by setting
CDC's National Outbreak Reporting System (NORS) records how big outbreaks are in each setting, and a few settings have a published real-world cost. Combining the two gives a per-outbreak figure nobody publishes directly. Each row states its inputs.
| Setting | Size of an average norovirus outbreak (NORS) | Illness cost per outbreak | What the setting itself pays — published figures |
|---|---|---|---|
| All reported outbreaks | Median 22 illnesses; norovirus caused 22,820 (59%) of 38,395 enteric outbreaks reported 2009–2019, and its outbreaks were significantly larger than any other pathogen's; 2% of cases hospitalised (Wikswo et al., CID 2022) | $11,100 – $12,300 (22 × $505–$558) | — |
| Restaurant | Restaurants were the setting of 64% of the 1,008 foodborne norovirus outbreaks reported 2009–2012; infected food workers were the source in 70% of outbreaks with a known contributing factor (Hall et al., MMWR 2014) | At the model's five-person size: $2,500–$2,800; at 22: $11,100–$12,300 | Bartsch 2018 model, norovirus: $3,911 – $2,584,733 depending on size, lost meals, fines and lawsuits (table above). Real disclosure: see Chipotle, below |
| Long-term care facility | 31.8 cases per outbreak — 416,284 cases ÷ 13,092 outbreaks, 2009–2018; 90.4% person-to-person; median resident attack rate 29%; 21.6 hospitalizations and 2.3 deaths per 1,000 cases (Calderwood et al., CID 2022) | $16,000 – $17,700 (31.8 × $505–$558) | Hospital care: 31.8 × 21.6 ÷ 1,000 = 0.69 admissions per outbreak × $14,083 VHA median ≈ $9,700 per outbreak; one death per ~14 outbreaks (1,000 ÷ 2.3 ÷ 31.8). Facility response costs (cohorting, sick leave, cleaning, closed admissions): no published figure |
| Hospital | The documented case: 355 cases (90 patients, 265 healthcare workers) over February–May 2004 at Johns Hopkins; staff attack rates up to 38%; 13 staff needed emergency care or admission (Johnston et al., CID 2007) | $179,000 – $198,000 (355 × $505–$558) | $657,644 total — lost revenue from unit closures, sick leave and cleaning (Johnston et al. 2007); $1,852 per case (our division); about $1.17 million in August 2026 dollars (CPI-U 188.0 in April 2004 → 334.98, × 1.782) |
| School or childcare | 46 illnesses per norovirus outbreak — 110,190 illnesses ÷ 2,383 outbreaks, 2009–2019; school outbreaks median 29 cases over 9 days, childcare median 10 cases over 15 days; 85.7% person-to-person (Mattison et al., Pediatrics 2022) | $23,300 – $25,800 (46 × $505–$558) — nearly all of it parents' lost workdays | No per-outbreak figure. Scale: childcare-associated viral gastroenteritis (norovirus, rotavirus, adenovirus) costs Michigan alone an estimated $15–31 million a year, mostly lost productivity (Hayashi et al., J Pediatric Infect Dis Soc 2021) |
| Cruise ship | 133 acute gastroenteritis outbreaks on ships in US jurisdiction 2008–2014, 97% of those tested caused by norovirus (Freeland et al., MMWR 2016); CDC posts an outbreak when ≥3% of passengers or crew fall ill — 14, 18 and 23 outbreaks in 2023, 2024 and 2025 on our tally. Industry figure: 4 outbreaks, 834 passengers on ships leaving US ports in 2013 = 208 per outbreak (Carnival Corporation 10-K, FY2014) | $105,000 – $116,000 (208 × $505–$558) | Not disclosed. Refunds, future-cruise credits, early debarkation, deep cleaning and delayed departures are the real cost and no line publishes them (see below) |
Chipotle: the one company that had to put numbers on the record
Restaurants do not publish outbreak costs. Chipotle Mexican Grill is the exception, not by choice but because it is listed, and a listed company must tell its shareholders when its sales fall by a third. Every figure below is from its filings with the Securities and Exchange Commission or from the agreement it signed with the Department of Justice.
| Event | What the filing says | Our arithmetic |
|---|---|---|
| August 2015, Simi Valley, California | "Approximately 234 consumers and employees" of one restaurant reported illness over at least seven days; an employee had been sent home for vomiting two days before the restaurant acted (DOJ Statement of Facts). A federal grand jury subpoena followed in December 2015 (10-K 2015) | — |
| December 2015, Brighton (Boston), Massachusetts | "Approximately 141 people" ill over at least nine days, "likely the result of an ill apprentice manager" who had vomited in the restaurant (DOJ). The 10-K: the incident "worsened the adverse financial and operating impacts we experienced from the earlier E. coli incident" | — |
| Fourth quarter 2015 | Comparable restaurant sales −14.6%, including −30% in December; revenue $997.5 million vs $1,069.8 million a year earlier; net income $67.9 million vs $121.2 million | Revenue down $72.3 million; profit down $53.3 million in one quarter |
| First quarter 2016 | Comparable sales −29.7%; net loss of $26.4 million against a $122.6 million profit the year before | A $149.0 million swing in one quarter |
| Full year 2016 | Revenue $3,904.4 million vs $4,501.2 million; comparable sales −20.4%; average restaurant sales $1.868 million vs $2.424 million; net income $22.9 million vs $475.6 million | Revenue down $596.8 million; net income down $452.7 million — about 175 times the Bartsch model's worst case for a single restaurant |
| July 2017, Sterling, Virginia | A norovirus incident at one restaurant; the 10-Q says third-quarter comparable-sales gains "were offset by adverse company-wide sales impacts resulting from news regarding" it, and a further DOJ subpoena followed | One restaurant's outbreak moved a 2,400-restaurant chain's quarter |
| April 21, 2020 | Deferred prosecution agreement: a $25,000,000 criminal fine for adulterating food under the Food, Drug and Cosmetic Act, covering norovirus outbreaks in 2015 and 2017 at four restaurants and one Clostridium perfringens outbreak in 2018, in which "collectively, more than 1,100 people reported becoming ill" | ≈ $22,700 in fine per reported illness ($25 million ÷ 1,100) — more than the model's entire "very low impact" outbreak |
Two things in that record are worth more than the totals. The first is the mechanism: a single restaurant's outbreak, in Boston or in Sterling, moved sales at every restaurant in the chain, because the cost of a food-safety story is paid by the brand, not the branch. The Bartsch model prices a restaurant; it has no line for that. The second is the Statement of Facts itself, which is a description of how norovirus outbreaks happen — an employee vomits, is sent home, and the restaurant keeps serving — and which the government priced, in the end, at $25 million. Our food-handler rules page sets out what the Food Code required instead.
Cruise ships: the cost nobody discloses
Cruise outbreaks are the most visible norovirus events in America — CDC's Vessel Sanitation Program posts each one with its case counts — and the least costed. We searched the full text of every 10-K, 10-Q and 8-K filed with the SEC. Royal Caribbean's filings contain no mention of norovirus at all. Carnival Corporation's 10-K mentions it only as a risk factor and in an industry paragraph: "In 2013, 10.1 million passengers embarked on CLIA member cruise ships from U.S. ports. That year, there were four norovirus outbreaks on cruise ships departing from U.S. ports involving a total of 834 passengers, which represents only 0.008% of cruise passengers" — "1 in 12,000 cruise guests" against "1 in 15 Americans" on land (Carnival 10-K for the year ended November 30, 2014).
That paragraph is the only cruise-line number there is, and it gives an average of 208 ill passengers per posted outbreak — about $105,000–$116,000 of illness cost at $505–$558 each, on the passengers' side of the ledger. The line's side — partial refunds, future-cruise credits, medical care on board, deep cleaning between voyages, delayed departures and the reputational effect on bookings — is the larger part, and no line has ever published it. The honest per-outbreak figure for a cruise ship is therefore a floor: six figures in illness cost, plus an undisclosed amount. What the ships do to keep outbreaks rare, and what the 3% reporting threshold means, is on our cruise ship page.
What the cost is made of
Across every setting the same four components recur, in very different proportions:
- The illness itself — $505–$558 per case, nearly nine-tenths of it lost work and caregiving (Bartsch 2020). This is the whole cost of a school outbreak and a small part of a hospital's.
- Medical care for the vulnerable minority — 2% of outbreak cases hospitalised overall (Wikswo 2022), 21.6 per 1,000 in long-term care (Calderwood 2022), at $14,083 a median admission and more for the very old (Cates 2025).
- The venue's response — closed units, sick leave and cleaning made up the Hopkins hospital's $657,644 (Johnston 2007); cohorting and restricted admissions in nursing homes; deep cleans and delayed sailings on ships; the "closures for remediation" in Chipotle's filings.
- Lost custom, lawsuits and fines — the components that take a restaurant outbreak from four figures to seven in the Bartsch model, and that took Chipotle from a $475.6 million profit to a $22.9 million one and then to a $25 million fine.
The rule of thumb
Multiply the number of people ill by about $500 and you have the floor for any norovirus outbreak. Then ask who the ill people are (the elderly cost twenty times more in medical care than the young), whether the venue has to close anything, and whether anyone will sue. In a school the floor is the answer; in a nursing home add a hospital admission per outbreak and a death every fourteen; in a hospital multiply the floor by three; in a restaurant the floor is irrelevant if the outbreak makes the news.
Frequently asked questions
How much does a norovirus outbreak cost a restaurant?
In the only published model (Bartsch et al. 2018), a norovirus outbreak costs a restaurant from $3,911 (five ill, fast food, no consequences) to $2,584,733 (250 ill, fine dining, lawsuits and a fine), in 2017 dollars — and the pathogen changes that by only tens of dollars to $21,198. The one real disclosure, Chipotle's, shows a chain-level cost the model cannot reach: net income $452.7 million lower in 2016 than 2015, then a $25 million fine.
What does one case cost?
About $505–$558 in societal cost (Bartsch 2020 ÷ CDC's illness estimate), or $543 per foodborne case (USDA ERS, 2023 dollars). Where medical care is sought it is $640 outpatient, $2,203 in an emergency department and $14,083 as an inpatient at the median (Cates et al. 2025, VHA, 2024 dollars).
How much does an outbreak cost a nursing home?
Derived, since none is published: 31.8 cases per outbreak (Calderwood et al. 2022) × $505–$558 = about $16,000–$17,700 in illness cost, plus 0.69 hospital admissions per outbreak at a $14,083 median ≈ $9,700, plus the facility's own unpublished response costs. One resident dies for roughly every 14 outbreaks.
How much does an outbreak cost a cruise line?
Nobody outside the lines knows. The only industry figure is Carnival's: 834 passengers in four outbreaks in 2013, or 208 per outbreak — about $105,000–$116,000 in illness cost. Refunds, credits and cleaning are not disclosed; Royal Caribbean's SEC filings do not mention norovirus at all.
What did the Chipotle outbreaks cost?
Per its SEC filings: comparable sales −14.6% in Q4 2015 (−30% in December), −29.7% in Q1 2016 with a $26.4 million loss, full-year 2016 revenue down $596.8 million and net income down $452.7 million, plus a $25 million DOJ fine in 2020 for outbreaks in which more than 1,100 people reported illness. The 2015–16 figures combine E. coli and norovirus incidents and cannot be separated.
Why is the usual answer a "foodborne illness" figure?
Because Bartsch 2018 modelled 15 pathogens and its headline range is quoted without one. Norovirus caused 59% of all enteric outbreaks reported to CDC in 2009–2019 (Wikswo et al. 2022), so the generic figure mostly is a norovirus figure — the paper's norovirus columns are within a few hundred dollars of it. What it leaves out is everything above: per-illness cost, outbreak size by setting, and the real disclosures.
This page compiles published economic figures and shows its own arithmetic. It is not medical advice; for what to do about an outbreak in a home, a rental or a workplace, see our prevention and rental host cleanup pages, and for exclusion rules our school and daycare and food-handler pages.
Sources & References
- Bartsch SM, Asti L, Nyathi S, Spiker ML, Lee BY. Estimated cost to a restaurant of a foodborne illness outbreak. Public Health Rep 2018;133(3):274–86 — the $3,968–$2.6 million headline range; Table 3 norovirus columns as tabulated; salmonella $63–$21,198 dearer than norovirus; pathogen effect ≤ $337,000. doi:10.1177/0033354917751129 · PubMed 29656701
- Bartsch SM, O'Shea KJ, Lee BY. The clinical and economic burden of norovirus gastroenteritis in the United States. J Infect Dis 2020;222(11):1910–9 — $10.6 billion a year, ~89% productivity losses. doi:10.1093/infdis/jiaa292
- U.S. Department of Agriculture, Economic Research Service. Cost estimates of foodborne illnesses (2025 data update, 2023 dollars) — norovirus: 5,461,731 cases, $2,968,300,000, $543 per case. ers.usda.gov
- Cates JE, Nelson RE, Suo Y, et al. Health care costs associated with norovirus at the Veterans Health Administration. JAMA Netw Open 2025;8(10):e2536600 — 7,768 episodes; medians $640 / $2,203 / $14,083; inpatient medians by age; $28,438,556 annual VHA cost. doi:10.1001/jamanetworkopen.2025.36600
- Wikswo ME, Roberts V, Marsh Z, et al. Enteric illness outbreaks reported through the National Outbreak Reporting System — United States, 2009–2019. Clin Infect Dis 2022;74(11):1906–13 — 38,395 outbreaks; norovirus 22,820 (59%); median 22 illnesses per norovirus outbreak; 2% hospitalised. doi:10.1093/cid/ciab771
- Calderwood LE, Wikswo ME, Mattison CP, et al. Norovirus outbreaks in long-term care facilities in the United States, 2009–2018: a decade of surveillance. Clin Infect Dis 2022;74(1):113–9 — 13,092 outbreaks, 416,284 cases; 90.4% person-to-person; 21.6 hospitalizations and 2.3 deaths per 1,000 cases. doi:10.1093/cid/ciab808
- Mattison CP, Calderwood LE, Marsh ZA, et al. Childcare and school acute gastroenteritis outbreaks: 2009–2020. Pediatrics 2022;150(5):e2021056002 — norovirus 2,383 outbreaks, 110,190 illnesses; school median 29 cases / 9 days, childcare 10 / 15; 85.7% person-to-person. doi:10.1542/peds.2021-056002
- Hall AJ, Wikswo ME, Pringle K, Gould LH, Parashar UD. Vital signs: foodborne norovirus outbreaks — United States, 2009–2012. MMWR 2014;63(22):491–5 — 1,008 outbreaks; restaurants 64%; food workers implicated in 70%. PubMed 24898166
- Freeland AL, Vaughan GH Jr, Banerjee SN. Acute gastroenteritis on cruise ships — United States, 2008–2014. MMWR 2016;65(1):1–5 — 133 outbreaks; 92 of 95 tested (97%) norovirus. doi:10.15585/mmwr.mm6501a1
- Johnston CP, Qiu H, Ticehurst JR, et al. Outbreak management and implications of a nosocomial norovirus outbreak. Clin Infect Dis 2007;45(5):534–40 — 355 cases; costs "estimated to be $657,644" including lost revenue from unit closures, sick leave and cleaning. doi:10.1086/520666
- Hayashi MAL, Eisenberg JNS, Martin ET, Hashikawa AN. The statewide economic impact of child care-associated viral acute gastroenteritis infections. J Pediatric Infect Dis Soc 2021;10(8):847–55 — $15–31 million a year in Michigan. doi:10.1093/jpids/piaa073
- Chipotle Mexican Grill, Inc. Annual Report on Form 10-K for the year ended December 31, 2015 (filed February 5, 2016) — Q4 comparable sales −14.6%, December −30%; quarterly revenue and net income; Simi Valley subpoena. sec.gov
- Chipotle Mexican Grill, Inc. Quarterly Report on Form 10-Q for the quarter ended March 31, 2016 — comparable sales −29.7%; net loss $26,432 thousand vs net income $122,641 thousand. sec.gov
- Chipotle Mexican Grill, Inc. Annual Report on Form 10-K for the year ended December 31, 2016 — revenue $3,904.4 vs $4,501.2 million; net income $22,938 vs $475,602 thousand; comparable sales −20.4%. sec.gov
- Chipotle Mexican Grill, Inc. Quarterly Report on Form 10-Q for the quarter ended September 30, 2017 — Sterling, Virginia norovirus incident and follow-up subpoena. sec.gov
- Chipotle Mexican Grill, Inc. Form 8-K, April 21, 2020, Exhibit 10.1: Deferred Prosecution Agreement with the United States Attorney's Office, Central District of California, with Statement of Facts — $25,000,000 fine; Simi Valley (~234 ill), Boston (~141 ill), Sterling and Los Angeles norovirus offences; "more than 1,100 people". sec.gov
- Carnival Corporation & plc. Annual Report on Form 10-K for the year ended November 30, 2014 — four norovirus outbreaks, 834 passengers, 10.1 million embarkations from US ports in 2013. sec.gov
- U.S. Securities and Exchange Commission, EDGAR full-text search for "norovirus" in Forms 10-K, 10-Q and 8-K, run September 20, 2026 — 1,010 filings network-wide; none from Royal Caribbean Cruises Ltd. (CIK 884887). efts.sec.gov
- U.S. Bureau of Labor Statistics. CPI-U, all items, US city average (CUUR0000SA0) — April 2004 188.0; August 2026 334.98. data.bls.gov
Economic Impact
The $10.6 billion national figure this page divides up, and where two estimates diverge.
Cruise Ships
The VSP tally, the 3% threshold, and what the lines do between voyages.
Food-Handler Rules
The exclusion rules that would have prevented the Chipotle outbreaks, from the Food Code.
Cost Per Case, Virus by Virus
Norovirus's $505 beside COVID-19, Ebola, hantavirus, influenza and measles on the hub.
