How public health corrections avoid repeating myths

Introduction

Public health agencies cannot correct rumours the same way they correct a spelling mistake. A false claim about vaccines, outbreaks, medicines, or side effects can affect real decisions about treatment, prevention, and trust in health services. If a correction repeats the rumour too prominently, some people may remember the false claim more clearly than the correction itself. That is why many public health communicators use a “truth sandwich” or fact-warning-explanation structure: start with the accurate information, briefly warn that a false claim is circulating, explain why it is wrong or misleading, and then return to the verified fact. The goal is not simply to rebut a myth. It is to make the correct information easier to remember, harder to distort, and more useful for future decisions. [Center for Climate Change Communication]climatechangecommunication.orgCenter for Climate Change Communication Debunking HandbookIf parents withhold vaccinations from their children based on mistaken beliefs, public health suffers6.Read more… [2PHCC]

Why health rumours need careful correction structure

Health misinformation has consequences that go beyond online arguments. False claims about vaccines, infectious diseases, treatments, or public health guidance can change behaviour at population scale. During the COVID-19 pandemic, researchers and public health bodies repeatedly warned that misinformation affected attitudes towards vaccination, masking, and other protective measures. [CDC]wwwnc.cdc.gov20 3139 articleCDCAddressing COVID-19 Misinformation on Social Media…Jan 4, 2021 — Misinformation is not a new problem, but it poses particular chall… [PMC]pmc.ncbi.nlm.nih.govPMCHealth Communication and Behavioral Change DuringPMCby D Albarracin · 2024 · Cited by 36 —… facts (Lewandowsky et al., 2020). After repeating the facts, warn that misinformation is co…

A further challenge is what researchers call the “continued influence effect”. Even after people learn that a claim is false, the original information can continue shaping their reasoning. Simply telling people that a rumour is wrong may remove the label of truth without replacing the underlying explanation. Public health corrections therefore try to provide an alternative account that answers the same question the rumour appeared to answer. Brown Climate Social Science Network [Shaping Tomorrows World]shapingtomorrowsworld.orgShaping Tomorrows WorldThe Debunking Handbook Part 5: Filling the gap with an…by S Lewandowsky — Sources of the continued influence ef…

For health agencies, this is also a governance problem. Public institutions must communicate at scale, often during outbreaks or emergencies when uncertainty is high. Corrections need to work across different levels of health literacy, different languages, and highly fragmented media environments. The message must be accurate enough for experts yet simple enough to survive being quoted, reposted, or shortened on social media. PMC [World Health Organization]cdn.who.intWorld Health OrganizationAddressing mpox misinformation: practical tips for…Misinformation and disinformation can spread fear and stig…

How the fact-warning-explanation sequence works in practice

The truth sandwich is usually described as four connected moves rather than a single sentence.

Public health communication guides frequently recommend this sequence because it keeps the accurate information as the main message. The Public Health Communicators Collaborative’s misinformation guide describes a truth sandwich as beginning and ending with facts while clearly signalling that the false claim is false before discussing it. The Debunking Handbook similarly advises leading with the fact, explaining the flaw, and reinforcing the correct information. [PHCC]

The opening fact sets the frame

The first sentence should answer the health question directly rather than introduce the rumour.

Instead of:

“A rumour claims the measles vaccine causes autism.”

A public health correction would typically begin with:

“Extensive research shows that measles-containing vaccines do not cause autism.”

The difference seems small, but it changes which information receives the most attention. The correction starts with what people should remember rather than what they should reject. Public health messaging guides repeatedly emphasise leading with verified information for this reason. PMC [Center for Climate Change Communication]climatechangecommunication.orgCenter for Climate Change Communication Debunking HandbookIf parents withhold vaccinations from their children based on mistaken beliefs, public health suffers6.Read more…

The warning prevents accidental reinforcement

After establishing the fact, communicators briefly identify the misinformation.

The warning acts as a label: readers are told that the next claim is inaccurate before they encounter it. This reduces the risk that the false statement is processed as a plausible new fact. Guidance from misinformation researchers and public health communicators often recommends brief warnings rather than long restatements of the myth. PHCC [Shaping Tomorrows World]shapingtomorrowsworld.orgShaping Tomorrows WorldThe Debunking Handbook Part 5: Filling the gap with an…by S Lewandowsky — Sources of the continued influence ef…

A typical warning might be:

“You may have seen posts falsely claiming that…”

The warning is short because the correction is not trying to make the rumour memorable.

The explanation replaces the rumour’s story

The explanation is the most important part of the correction.

People often accept rumours because they appear to explain something confusing: a medical event, a side effect, a policy decision, or an alarming image. Effective public health corrections therefore explain not only that a claim is false but also why it spread or why it seemed convincing.

For example, if a social media post links a vaccination campaign to a medical event, the explanation might clarify that serious illnesses occur in large populations every day, that timing alone does not prove causation, and that safety monitoring systems investigate reports precisely because health authorities expect some events to occur by coincidence. The correction supplies a replacement explanation that is more accurate than the rumour. [Center for Climate Change Communication]climatechangecommunication.orgCenter for Climate Change Communication Debunking HandbookIf parents withhold vaccinations from their children based on mistaken beliefs, public health suffers6.Read more… [ScienceDirect]sciencedirect.comThe repetition of…Read more…

The final fact becomes the takeaway

The correction ends by restating the verified information.

This closing fact is what communicators want readers to remember later when they encounter the rumour again. The objective is not to win a debate but to leave the audience with a clear mental summary that can compete with the misinformation in future recall. [PHCC] [PMC]pmc.ncbi.nlm.nih.govPMCThe impact of misinformation on the COVID-19 pandemicSince the inception of the current pandemic, COVID-19 related misinformation has played a role in defaulting control of the situation.Rea…

Sample correction: vaccine-autism rumours

Vaccine misinformation remains one of the clearest examples of truth-sandwich correction in public health.

A fact-led correction might work like this:

Fact: Large studies involving many populations have found no evidence that routine childhood vaccines cause autism.

Explanation: The claim originated from discredited research that was later withdrawn. Subsequent studies involving far larger groups of children failed to find a causal link. Scientists continue monitoring vaccine safety through multiple surveillance systems.

Fact: The evidence shows that vaccines protect against serious disease and do not cause autism. [Center for Climate Change Communication]climatechangecommunication.orgCenter for Climate Change Communication Debunking HandbookIf parents withhold vaccinations from their children based on mistaken beliefs, public health suffers6.Read more… [Robert Koch Institute]rki.deRobert Koch InstituteVaccination myths: Effectively debunking misinformationTruth sandwiches can be used during the patient consultation…

Notice that the myth appears only briefly. Most of the correction is devoted to the evidence and the explanation.

Sample correction: reports of side effects after vaccination

Public health agencies frequently face claims that an illness occurring after vaccination proves that the vaccine caused it.

A truth-sandwich response often focuses on the difference between coincidence and causation.

Fact: Vaccine safety systems investigate reports of medical events after vaccination.

Explanation: Millions of people receive vaccines. Some will experience unrelated illnesses shortly afterwards simply because those illnesses occur in everyday life. Safety investigators compare reported events with expected background rates and examine whether there is evidence of a causal relationship.

Fact: Reports are monitored carefully, but a report alone does not prove that a vaccine caused the event. [Johns Hopkins Center for Health Security+2Center for Climate Change Communication]

This format gives people a framework for understanding why adverse-event reporting systems exist without encouraging them to interpret every report as proof of harm.

Sample correction: old or mislabelled outbreak images

Public health misinformation is not limited to vaccines. During outbreaks, old photographs and videos are often recycled with new captions.

A correction might look like this:

Fact: The image being shared is not from the current outbreak.

Explanation: The image was originally published during an earlier event and has been reposted with a misleading caption. Reverse-image searches and news archives show that it predates the current outbreak.

Fact: The photograph does not document the event being claimed and should not be used as evidence about the current situation.

This approach keeps attention on verification rather than on the dramatic claim attached to the image. It also gives readers a practical reason the image is misleading instead of merely labelling it false.

Why public health teams increasingly combine truth sandwiches with trust-building

The structure alone does not guarantee success. Public health researchers increasingly emphasise that corrections are more effective when audiences trust the source delivering them. Communities with low institutional trust may reject technically correct information if they see the messenger as hostile, partisan, or dismissive. [Taylor & Francis Online]tandfonline.comHealth-related myths spread rapidly and can have a negative impact not only on individuals, but also on public health… [PMC]pmc.ncbi.nlm.nih.govPMCCombating Misinformation as a Core Function of Public Healthby J Knudsen · 2023 · Cited by 68 — Misinformation and disinformation are…

For that reason, many health agencies combine truth-sandwich corrections with other practices:

• Using local clinicians, pharmacists, community leaders, or culturally trusted messengers.
• Acknowledging uncertainty when evidence is still emerging.
• Explaining how health authorities know what they know.
• Addressing fears and concerns directly rather than treating them as irrational.
• Providing practical actions people can take immediately. [PMC]pmc.ncbi.nlm.nih.govPMCStrategies and prerequisites for combating healthPMCby L Keikha · 2025 · Cited by 2 — This research aimed to identify the prerequisites and best strategies for combating health misinform… [PMC]pmc.ncbi.nlm.nih.govPMCThe truth sandwich format does not enhance the correction of…by B Swire-Thompson · 2025 · Cited by 2 — However, there was no eviden…

In practice, the most effective public health correction often sounds less like a fact-check and more like a clear explanation from a trusted source.

What public health communicators still debate

The truth sandwich is widely recommended, but researchers continue to examine how much the format itself matters compared with the quality of the explanation. Recent studies have suggested that detailed, evidence-based corrections can work well even when they do not strictly follow a truth-sandwich sequence. Some findings indicate that the explanatory content and source credibility may matter more than the exact order of sentences. PMC [ResearchGate Even so]researchgate.netPDF) The Truth Sandwich Format Does Not Enhance…25 Jan 2026 — These findings suggest that clear and detailed corrections can be power…, public health organisations continue to favour fact-first structures because they reduce the risk of accidentally amplifying misinformation and provide a consistent template for rapid response. The continuing debate is therefore less about whether facts should lead and more about which combinations of explanation, messenger, empathy, and evidence create corrections that people will remember and trust. [PHCC] [ScienceDirect]sciencedirect.comof the three misinformation-correction conditions. Conclusions… Balakrishnan et al. Infodemic and fake news – A comprehensive overview…

Amazon book picks

Further Reading

Books and field guides related to How public health corrections avoid repeating myths. Use these as the next step if you want deeper reading beyond the article.

Book

Bad Science

By Ben Goldacre

Directly tackles health misinformation and evidence claims.

See on Amazon

Book

Calling Bullshit

By Carl T. Bergstrom, Jevin D. West

Helps readers evaluate health claims and statistics.

See on Amazon

Book

The panic virus

By Seth Mnookin

First published 2011. Subjects: Vaccination, Mass media and culture, Health behavior, History, Psychological aspects.

See on Amazon

Book

Calling Bullshit: The Art of Skepticism in a Data-Driven World

By Carl T. Bergstrom and Jevin D. West

Helps readers evaluate health claims and statistics.

See on Amazon

Browse more on Amazon: Bad Science Calling Bullshit The panic virus

As an Amazon Associate I earn from qualifying purchases.

eBay marketplace picks

Marketplace Samples

Example marketplace items related to this page. Use the search link to explore similar finds on eBay.

Shop location

Using USA USA USAUKCanadaAustraliaIreland

Example eBay listing

Aihrgdesign A Vintage Public Health Framed Wall Art Poster Canvas Print Picture

Search eBay.co.uk: public health poster

Browse similar on eBay.co.uk

Example eBay listing

Vintage 1950s public health awareness advert poster

Search eBay.co.uk: public health poster

Browse similar on eBay.co.uk

Example eBay listing

Vintage 1950s public health awareness advert poster

Search eBay.co.uk: public health poster

Browse similar on eBay.co.uk

Example eBay listing

Vintage 1950s public health awareness advert poster

Search eBay.co.uk: public health poster

Browse similar on eBay.co.uk

Browse more on eBay.co.uk

Example items shown for inspiration; availability and pricing can change. Branchoria may earn a commission if you purchase through outbound eBay links.

Endnotes

1. Source: pmc.ncbi.nlm.nih.gov
   Title: PMCHealth Communication and Behavioral Change During
   Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC11295396/
   Source snippet

   PMCby D Albarracin · 2024 · Cited by 36 —... facts (Lewandowsky et al., 2020). After repeating the facts, warn that misinformation is co...

2. Source: wwwnc.cdc.gov
   Title: 20 3139 article
   Link: https://wwwnc.cdc.gov/eid/article/27/2/20-3139_article
   Source snippet

   CDCAddressing COVID-19 Misinformation on Social Media...Jan 4, 2021 — Misinformation is not a new problem, but it poses particular chall...

3. Source: pmc.ncbi.nlm.nih.gov
   Title: PMCThe impact of misinformation on the COVID-19 pandemic
   Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC9114791/
   Source snippet

   Since the inception of the current pandemic, COVID-19 related misinformation has played a role in defaulting control of the situation.Rea...

4. Source: pmc.ncbi.nlm.nih.gov
   Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC9923817/
   Source snippet

   PMCCombating Misinformation as a Core Function of Public Healthby J Knudsen · 2023 · Cited by 68 — Misinformation and disinformation are...

5. Source: sciencedirect.com
   Link: https://www.sciencedirect.com/science/article/pii/S2352250X2500226X
   Source snippet

   The [repetition]({{ 'repetition/' | relative_url }}) of...Read more...

6. Source: pmc.ncbi.nlm.nih.gov
   Title: PMCStrategies and prerequisites for combating health
   Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC12797484/
   Source snippet

   PMCby L Keikha · 2025 · Cited by 2 — This research aimed to identify the prerequisites and best strategies for combating health misinform...

7. Source: pmc.ncbi.nlm.nih.gov
   Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC12377696/
   Source snippet

   PMCThe truth sandwich format does not enhance the correction of...by B Swire-Thompson · 2025 · Cited by 2 — However, there was no eviden...

8. Source: researchgate.net
   Link: https://www.researchgate.net/publication/394196375_The_Truth_Sandwich_Format_Does_Not_Enhance_the_Correction_of_Misinformation
   Source snippet

   (PDF) The Truth Sandwich Format Does Not Enhance...25 Jan 2026 — These findings suggest that clear and detailed corrections can be power...

9. Source: sciencedirect.com
   Link: https://www.sciencedirect.com/science/article/abs/pii/S0264410X25007601
   Source snippet

   of the three misinformation-correction conditions. Conclusions... Balakrishnan et al. Infodemic and [fake news]({{ 'fake-news/' | relative_url }}) – A comprehensive overview...

10. Source: sciencedirect.com
    Link: https://www.sciencedirect.com/science/article/pii/S0738399125006202
    Source snippet

    disinformation on social media were not significantly different from simple corrective information.Read...

11. Source: stacks.cdc.gov
    Link: https://stacks.cdc.gov/view/cdc/102462
    Source snippet

    In one effort, the World Health...

12. Source: climatechangecommunication.org
    Title: Center for Climate Change Communication Debunking Handbook
    Link: https://www.climatechangecommunication.org/wp-content/uploads/2023/09/DebunkingHandbook2020.pdf
    Source snippet

    If parents withhold vaccinations from their children based on mistaken beliefs, public health suffers6.Read more...

13. Source: shapingtomorrowsworld.org
    Link: https://www.shapingtomorrowsworld.org/debunking-handbook-part-5-filling-gap-with-alternative-explanation.html
    Source snippet

    Shaping Tomorrows WorldThe Debunking Handbook Part 5: Filling the gap with an...by S Lewandowsky — Sources of the continued influence ef...

14. Source: cdn.who.int
    Link: https://cdn.who.int/media/docs/default-source/crs-crr/adressing-mpox-misinformation-practical-tips-for-communities.pdf?sfvrsn=8687a3da_3
    Source snippet

    World Health OrganizationAddressing mpox misinformation: practical tips for...Misinformation and disinformation can spread fear and stig...

15. Source: rki.de
    Link: https://www.rki.de/EN/Topics/Infectious-diseases/Immunisation/Information-material/Vaccination-myths/effectively-debunking-misinformation.html
    Source snippet

    Robert Koch InstituteVaccination myths: Effectively debunking misinformationTruth sandwiches can be used during the patient consultation...

16. Source: tandfonline.com
    Link: https://www.tandfonline.com/doi/full/10.1080/10410236.2026.2623508?needAccess=true&scroll=top
    Source snippet

    Health-related myths spread rapidly and can have a negative impact not only on individuals, but also on public health...

Additional References

1. Source: who.int
   Link: https://www.who.int/teams/digital-health-and-innovation/digital-channels/combatting-misinformation-online
   Source snippet

   Combatting misinformation onlineWHO and partners recognize that misinformation online has the potential to travel further, faster and som...

2. Source: publichealthcollaborative.org
   Link: https://publichealthcollaborative.org/wp-content/uploads/2025/03/PHCC_Quick-Misinformation-Guide.pdf
   Source snippet

   PHCCA Quick Guide to Public Health MisinformationTruth Sandwich Method for Debunking. Break down debunking with the Truth Sandwich method...

3. Source: apa.org
   Link: https://www.apa.org/pubs/reports/misinformation-consensus-statement.pdf

4. Source: cidrap.umn.edu
   Title: public health experts try prebunk misinformation about vaccines ahead cdc
   Link: https://www.cidrap.umn.edu/childhood-vaccines/public-health-experts-try-prebunk-misinformation-about-vaccines-ahead-cdc
   Source snippet

   health experts try to 'prebunk' misinformation about...Dec 4, 2025 — Prebunking can help inoculate people against misinformation by prov...

5. Source: rki.de
   Link: https://www.rki.de/EN/Topics/Infectious-diseases/Immunisation/Information-material/Vaccination-myths/all-or-nothing-thinking_RCT.html
   Source snippet

   Vaccination myths: Effectively debunking misinformation. Date: 03/12/2025. Fact: Even in the absence...Read more...

6. Source: scientificamerican.com
   Title: how to debunk misinformation about covid vaccines and masks
   Link: https://www.scientificamerican.com/article/how-to-debunk-misinformation-about-covid-vaccines-and-masks/
   Source snippet

   How to Debunk Misinformation about COVID, Vaccines...Apr 1, 2021 — Debunk misinformation about COVID, vaccines and masks. We each have m...

7. Source: hhs.gov
   Title: surgeon general misinformation advisory
   Link: https://www.hhs.gov/sites/default/files/surgeon-general-misinformation-advisory.pdf
   Source snippet

   Confronting Health MisinformationJul 14, 2021 — I am urging all Americans to help slow the spread of health misinformation during the COV...

8. Source: skepticalscience.com
   Title: debunking handbook 2020 references
   Link: https://skepticalscience.com/debunking-handbook-2020-references.html
   Source snippet

   The Debunking Handbook 2020: References26 Oct 2020 — Sources of the continued influence effect: When misinformation in [memory]({{ 'memory/' | relative_url }}) affects lat...

9. Source: ltrr.arizona.edu
   Title: Explicit warnings reduce but do not eliminate the.Read more
   Link: https://www.ltrr.arizona.edu/~katie/kt/natsgc/Debunking_Handbook.pdf
   Source snippet

   Debunking Handbookby S Lewandowsky — Sources of the continued influence effect: When discredited information in memory affects later infe...

10. Source: centerforhealthsecurity.org
    Title: 24 02 05 cdc misinfo playbook 2
    Link: https://centerforhealthsecurity.org/sites/default/files/2024-02/24-02-05-cdc-misinfo-playbook_2.pdf
    Source snippet

    Johns Hopkins Center for Health SecurityPractical playbook for addressing health misinformationFeb 1, 2024 — Misleading rumors, misinform...