Vaccination remains one of the most effective public health interventions in modern medicine. Yet the return of measles outbreaks in multiple regions has shown how quickly progress can be reversed when vaccination coverage slips. The ethical problem is not only that false claims circulate online or within communities. It is that vaccine misinformation can distort parental decision-making, lower uptake, weaken herd immunity, and expose children to avoidable harm.

In paediatric care, that matters especially because children usually do not make the final decision themselves, yet they may bear the clinical consequences. The World Health Organization (WHO) continues to warn that measles remains highly contagious and dangerous, particularly for unvaccinated young children, while the shows how rapidly outbreaks can expand in under-vaccinated communities.

What counts as vaccine misinformation?

For clinicians, it is important to define the issue precisely. Vaccine misinformation refers to false, inaccurate, or misleading vaccine-related claims, whether or not the person sharing them intends to deceive. That is distinct from disinformation, which usually implies deliberate deception. In practice, however, the ethical concern is often the same: A parent may make decisions on the basis of materially inaccurate claims about safety, efficacy, ingredients, adverse effects, or necessity.

Common examples include the claim that routine childhood vaccines ‘overload’ the immune system, that MMR causes autism, or that natural infection is always safer than vaccination. These are not minor misunderstandings. They can alter risk perception in ways that undermine genuinely informed decision-making. Recent paediatric commentary has warned that misinformation and disinformation continue to undermine progress in child health and erode confidence in routine immunisation.

Herd immunity as a shared ethical good

The idea of herd immunity, or community immunity, is sometimes discussed as if it were merely a technical epidemiological threshold. It is more than that. It is a form of shared protection created when enough people are immune to interrupt transmission and thereby reduce risk to those who remain susceptible.

For measles, that threshold is particularly high. WHO continues to use the benchmark of ~95% coverage to maintain protection against sustained transmission, while also recognising that local patterns of clustering, travel, and social contact affect outbreak dynamics. This point should be stated carefully: Herd immunity is not an on-off switch. But when coverage falls materially below that range, especially in pockets of under-immunisation, outbreaks become more likely. That is precisely why declining confidence in routine childhood vaccines has ethical implications beyond the individual consultation.

Why measles remains such an important example

Measles is a particularly strong example because it is often trivialised in public discourse as a routine childhood illness. That characterisation is inaccurate. According to WHO, measles can cause pneumonia, encephalitis, blindness, severe diarrhoea, and death, with complications most common in children <5-years.

The WHO reports that ~95 000 people died from measles in 2024, and that vaccination prevented ~59 million deaths between 2000 and 2024. One infected person can generate up to 18 secondary infections, making measles one of the most contagious diseases known. These facts matter ethically because they show that paediatric vaccination is not a low-stakes lifestyle choice. It is a prevention tool used against a disease with serious consequences, especially for children who are too young, too ill, or otherwise unable to protect themselves.

The first ethical consequence: Harm to the individual child

The first ethical consequence of vaccine misinformation is direct harm to the individual child. When vaccination is delayed or refused because parents believe false claims, the child may be exposed to avoidable risks of infection, hospitalisation, long-term complications, and death. This is not merely theoretical. For example, during the 2025 West Texas measles outbreak, an unvaccinated six-year-old child died from measles complications, followed by a second unvaccinated child death in the same outbreak.

Public reporting indicated that these deaths occurred in communities with low vaccination coverage where misinformation and misplaced confidence in ‘natural immunity’ had circulated widely. While these tragic cases did not, so far as public reporting shows, produce a reported judicial finding of parental liability, they starkly illustrate the real-world consequences of vaccine refusal for children themselves.

This engages the familiar principles of beneficence and non-maleficence. In paediatrics, those principles do not only require clinicians to avoid harmful treatment. They also require serious regard for preventable harms that can arise when effective prevention is declined on false premises.

Legal scholarship has gone further, arguing that in some jurisdictions persistent refusal of routine childhood vaccination may, in certain circumstances, approach the threshold of medical neglect, although the case law remains limited and context-specific. Respect for parental concern remains essential, but concern shaped by misinformation is not the same thing as an informed and balanced appraisal of risk.

The second ethical consequence: Harm to vulnerable others

The second consequence is harm to others. When enough families delay or refuse vaccination, the cumulative effect can weaken community protection and expose vulnerable children to increased danger. This includes infants not yet fully immunised, children receiving chemotherapy, children with immunodeficiency, and those with valid medical contraindications. Here the ethics moves beyond private choice into the territory of justice and solidarity. The language of ‘parental choice’ becomes incomplete if it obscures the fact that some choices transfer risk to people who did not choose it.

Measles remains the clearest paediatric example because it is highly contagious and outbreaks can expand rapidly when vaccination coverage falls or becomes uneven. In South Africa, the National Institute of Communicable Diseases reported 2756 laboratory-confirmed measles cases by the end of 2025, with continued transmission into early 2026 (420 laboratory-confirmed cases reported nationally by 22 February 2026).

At a regional level, the WHO African Region’s immunisation dashboard reports 195 039 measles cases in 2023 and 520 102 in 2024, underscoring the scale at which outbreaks can accelerate when immunity gaps widen. Coverage data are equally concerning: WHO/UNICEF estimates for South Africa indicate measles first-dose (MCV1) coverage of 76% and second dose (MCV2) coverage of 79% in 2024, well below the ~95% two-dose coverage generally needed to prevent sustained measles transmission. These are not merely statistics, they illustrate how quickly collective vulnerability emerges when routine childhood immunisation weakens.

Covid-19 also remains a useful, though more complex, reminder that vaccine misinformation can have population-level ethical consequences far beyond the individual decision-maker. During the pandemic, misinformation and mistrust affected uptake, intensified polarisation, and complicated efforts to protect older persons, immunocompromised patients, and health systems under pressure.

While Covid-19 differs from routine childhood vaccination in important respects, it reinforced a central ethical lesson, namely that in communicable disease control, individual decisions can generate foreseeable risks for others.

The point is even sharper in conflict-affected or war-torn settings, where disrupted health systems, displacement, insecurity, interrupted cold chains, and reduced access to care already weaken vaccination coverage. In such contexts, outbreaks of measles, polio, cholera, and other vaccine-preventable or outbreak-prone diseases can spread rapidly among highly vulnerable populations.

Misinformation is rarely the sole cause in these settings, and it should not be overstated. Yet where public trust is already fragile, false or misleading claims can further undermine uptake and complicate outbreak control. Ethically, this highlights not only the principle of non-maleficence, but also global justice, the harms of misinformation are often magnified where children are already exposed to structural vulnerability, conflict, and health-system collapse.

The third ethical consequence: Distortion of informed decision-making

The third ethical consequence is that misinformation can undermine valid informed consent rather than enhance it. Anti-vaccine rhetoric often presents refusal as an exercise of autonomy or ‘informed choice’. But ethically and legally, informed choice depends on access to relevant and accurate information, sufficient understanding, and a reasonable appreciation of risks and benefits.

In South Africa, the National Health Act 61 of 2003 requires that users be given adequate knowledge and that health services generally not be provided without informed consent. Section 6 requires healthcare providers to inform users, while section 7 links informed consent to that disclosure framework. If a parent’s understanding is materially shaped by false claims, the ethical integrity of the decision is weakened, even if the parent is acting sincerely.

South Africa’s Covid-19 legal response briefly underscored the seriousness with which harmful misinformation was viewed. Under regulation 11(5) of the emergency regulations issued in March 2020 under the Disaster Management Act, it became an offence to publish false information about Covid-19, a person’s infection status, or government measures, where this was done with the intention to deceive, the provision carried a potential penalty of a fine or imprisonment for up to six months.

That regulation was controversial and attracted legitimate freedom-of-expression criticism, and it should not be read as a general endorsement of criminalising misinformation. Even so, it is a useful reminder that the law itself recognised that false health information can distort public understanding and lead to harmful decisions in a public-health emergency.

The point, therefore, is not that parents lose all decisional authority whenever they are mistaken. It is that clinicians are not ethically required to treat demonstrably false claims as if they were equivalent to evidence-based risk information.

The fourth ethical consequence: Erosion of trust

A fourth ethical consequence is the erosion of trust. Trust remains central to paediatric practice because vaccination decisions are often made under conditions of uncertainty, fear, and asymmetry of expertise. Misinformation exploits that terrain by using anecdote, repetition, identity, and suspicion more effectively than evidence alone.

Recent academic work on vaccine hesitancy in Africa argues that hesitancy cannot always be understood simply as ignorance or irrationality, in some settings it is also connected to histories of exclusion, distrust, and failures of meaningful engagement. That does not justify false claims, but it does mean clinicians should avoid a simplistic moralising response. Parents influenced by misinformation may need correction, but they may also need respect, listening, and restoration of trust in the clinical relationship.

South African ethical and legal anchors

This is where South African legal and ethical anchors are especially helpful. First, section 28(2) of the Constitution provides that a child’s best interests are of paramount importance in every matter concerning the child.

Second, the Children’s Act 38 of 2005 gives effect to that principle and expressly states among its objects that the best interests of the child are of paramount importance in every matter concerning the child.

Third, the HPCSA ethical guidance continues to emphasise truthful communication, patient rights, and informed consent as central features of professional conduct. These are not narrow pro-vaccine mandates in themselves. But together they create a child-centred ethical and legal framework within which vaccine misinformation should be assessed.

Comparative vaccination case law is more directly instructive here than general child-rights jurisprudence. In South Africa, section 28(2) of the Constitution establishes that a child’s best interests are of paramount importance in every matter concerning the child, while section 7 of the Children’s Act 38 of 2005 gives structured content to that enquiry by directing attention to the child’s needs, vulnerability, and protection from harm.

Courts elsewhere have applied closely analogous reasoning in vaccination disputes. In Burch v Lipscomb, the Kentucky Court of Appeals upheld an order permitting routine childhood vaccination despite one parent’s religious objection, affirming that vaccination served the children’s best interests. In re SP., the California Court of Appeal likewise upheld vaccination orders for dependent children, treating immunisation as a medically appropriate welfare-protective intervention.

These cases are not binding in South Africa, and they do not mean that every parental refusal is automatically unlawful. They do, however, offer persuasive comparative support for a principle that fits comfortably within South African child law, where refusal of vaccination is grounded in misinformation and may expose a child to foreseeable, preventable harm, the child’s best interests may properly outweigh adult preference.

In other words, paediatric vaccine decisions should not be analysed as if they concern only adult preference. They concern the welfare of a child and the duties of a professional entrusted with that child’s care.

Parental autonomy is important, but not absolute

That child-centred framework also explains why parental autonomy in paediatric vaccination is important but not absolute. Parents ordinarily have wide discretion because they are usually presumed to act in their children’s interests. Yet that presumption weakens when decisions are based on demonstrably false claims and expose the child to foreseeable and preventable harm.

This should still be framed carefully. Not every refusal justifies coercion or legal escalation, and the threshold for state intervention will depend on context, law, disease risk, school-entry rules, and public health measures. But ethically, clinicians are entitled, and sometimes obliged, to be firmer when vaccine refusal rests on misinformation rather than on a balanced weighing of evidence. Respect does not require false equivalence.

 

Why South African context matters

South African relevance should also not be ignored. The ethical challenge in this country is not reducible to imported social-media narratives from the United States or Europe. Under-immunisation may also reflect structural disadvantage, service disruption, and inequitable access.

The WHO noted in 2025 that 14.5 million infants globally remained zero-dose, many in fragile settings where limited access to care and misinformation interact. NICD’s 2026 reporting likewise shows that measles and rubella surveillance remains a live public health concern in South Africa.

For that reason, an ethically sound position for South African practitioners has two parts:  

1. Challenge misinformation clearly
2. Avoid blaming families for system failures that also affect coverage.

Both are necessary if vaccine ethics is to remain clinically credible and socially just.

Conclusion

The central point is that vaccine misinformation is not merely an error in public debate. In paediatric practice it is an ethical problem because it can distort informed decision-making, increase avoidable risk to children, weaken herd immunity, and unfairly transfer danger to those least able to protect themselves. Clinicians therefore have duties not only to inform, but to communicate truthfully, to correct material falsehoods, to keep the child’s best interests at the centre of the consultation, and to act with due regard for the wider community consequences of declining vaccine uptake. In that sense, the ethical consequences of vaccine misinformation are best understood not only through autonomy, but through beneficence, non-maleficence, justice, solidarity, and professional responsibility.

Dr Marietjie Botes is a lawyer and academic researcher specialising in biotechnology law, neuroethics, data governance, and intellectual property law. Currently an exchange scholar at the University of Texas (United States), she transitioned from a 20-year career as a practising attorney in health law and biotechnology to academia, where she focuses on interdisciplinary research at the intersection of science, technology, law, and ethics. She holds BProc, LLB, LLM (Intellectual Property Law), and a PhD in Biotechnology Law. Her research explores the regulation and ethics of gene therapies, gene and stem cell research, the use of big geospatial data during pandemics, and digital health technologies such as brain-computer interfaces. She has published widely, co-edits a Springer Nature digital ethics special edition, is an elected  Academy of Science of South Africa member, and contributed legal expertise to South Africa’s Covid-19 country reports.

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