A small but measurable fraction of physicians hold skeptical or outright oppositional views toward vaccines. Surveys consistently place the number in the single digits to low teens, depending on the country and how the question is framed. That minority punches well above its weight in public influence, because a doctor’s credentials lend authority that no lay activist can match. Understanding who these physicians are, what shapes their views, and how their stance ripples through patient care requires looking at several layers of evidence that accumulated rapidly during and after the COVID-19 pandemic.
How Common Is Physician Vaccine Skepticism
The overwhelming majority of doctors support vaccination. But “overwhelming majority” still leaves room for a nontrivial minority. A survey of primary care physicians in the United States found that about one in ten did not agree that vaccines are generally safe, and a similar proportion did not agree they are effective.1PubMed Central. Imperfect messengers? An analysis of vaccine confidence among primary care physicians In France, a cross-sectional survey of hospital staff physicians found that while nearly 94% were strongly favorable toward vaccination in principle, roughly 42% showed what researchers classified as moderate vaccine hesitancy, meaning they harbored doubts about specific vaccines or specific schedules even while supporting vaccination broadly.2PubMed. Vaccine hesitancy among hospital staff physicians: A cross-sectional survey in France in 2019
Those two findings reveal something important: physician vaccine skepticism is not a single block. There is a small hard core of doctors who reject the premise that vaccines are safe or beneficial, and a larger penumbra of physicians who accept vaccines in general but have reservations about particular products, schedules, or mandates. The COVID-19 vaccines illustrated this gradient clearly. In the U.S. survey, about 69% of primary care doctors were very confident in the Moderna vaccine’s safety and roughly 73% felt the same about Pfizer, but only about 32% were very confident in the Johnson & Johnson vaccine.3PubMed Central. Imperfect messengers? An analysis of vaccine confidence among primary care physicians Skepticism, in other words, can be product-specific rather than ideological.
The Alternative Medicine Connection
The strongest predictor of vaccine hesitancy among physicians is not political affiliation or age but rather endorsement of complementary and alternative medicine. A cross-sectional study of doctors in four European countries found that physicians who scored higher on endorsement of alternative therapies recommended vaccines to patients less often, had lower personal vaccination rates, and were more accepting of patients delaying shots. A profile characterized by higher-than-average alternative medicine endorsement and lower-than-average vaccine confidence appeared in roughly 19% of the total sample, with the rate varying from about 6% in Portugal to nearly 24% in Germany.4PubMed Central. Endorsement of alternative medicine and vaccine hesitancy among physicians: A cross-sectional study in four European countries
The mechanism behind this link makes intuitive sense. A qualitative study of general practitioners and pediatricians in Austria and Germany who expressed vaccine hesitancy found that most of them held a critical stance toward conventional biomedicine and had opened private practices specifically to offer homeopathy or other alternative treatments.5PubMed Central. Vaccine hesitancy among physicians: a qualitative study with general practitioners and paediatricians in Austria and Germany Their skepticism toward vaccines was not an isolated opinion but part of a broader worldview that questioned pharmaceutical-driven medicine. Conversely, research on complementary and alternative providers who embraced mainstream medicine found they were likely to be vaccine accepters and to mention vaccines as a positive health measure to patients.6PubMed Central. Immunology beliefs as a factor in vaccine opposition among complementary and alternative medical providers So the dividing line is not simply “alternative medicine practitioner versus conventional doctor” but the degree to which a practitioner sees mainstream biomedicine as trustworthy.
Specialty matters too. In France, hesitancy was lowest among infectious disease specialists (about 12%) and pediatricians (roughly 28%).7PubMed. Vaccine hesitancy among hospital staff physicians: A cross-sectional survey in France in 2019 In the European four-country study, alternative medicine endorsement was lowest among pediatricians and highest among gynecologists, though the authors noted that country-level differences may have confounded the specialty comparison since only Germany’s sample included gynecologists.8PubMed Central. Endorsement of alternative medicine and vaccine hesitancy among physicians: A cross-sectional study in four European countries The pattern suggests that doctors who routinely see vaccine-preventable diseases up close tend to be more confident in vaccination.
How the COVID-19 Pandemic Changed the Landscape
Physician opposition to vaccines existed long before 2020, but the pandemic sharpened it, amplified it, and gave it political salience. A commentary in The Lancet described how a small cadre of politically conservative physicians actively opposed vaccination, masking, and other public health measures during COVID-19. These practitioners leveraged social media, created new professional organizations to spread misinformation, and partnered with conservative media outlets and political figures to amplify their messaging, undermining public health consensus and eroding trust in medical institutions.9PubMed Central. Confronting the evolution and expansion of anti-vaccine activism in the USA in the COVID-19 era
This was qualitatively different from the pre-pandemic landscape. Before COVID-19, vaccine-skeptical physicians tended to operate in the alternative-medicine space, and their influence was largely confined to patients who sought them out. The pandemic created conditions where a much larger audience was receptive to anti-establishment medical messaging, and a handful of credentialed doctors became central figures in a broader movement that folded vaccine opposition into resistance against lockdowns, mask mandates, and government health directives more generally.
The pandemic also reshaped how physicians who got vaccinated talked about vaccination with patients. A study of U.S. healthcare personnel found that providers who had received a COVID-19 booster were far more likely to strongly recommend specific vaccines to their patients. For instance, 46% of boosted healthcare personnel strongly recommended the Moderna vaccine compared to just 11% of those who had not received a booster.10npj Vaccines. Changes in vaccine attitudes and recommendations among US Healthcare Personnel during the COVID-19 pandemic A doctor’s own vaccination status, in other words, powerfully predicts what they tell patients.
Recurring Themes Across History
Physician involvement in anti-vaccine movements is not a twenty-first-century invention. A historical overview of anti-vaccine activism identified recurring themes stretching from early smallpox vaccination through mid-twentieth-century controversies, the 1998 Wakefield publication linking the MMR vaccine to autism (later retracted and thoroughly debunked), and the COVID-19 era. Across all of these periods, three threads persist: concerns about vaccine safety, distrust of institutions, and objections grounded in personal liberty.11PubMed. A historical overview of the anti-vaccine movement and its public health implications Doctors who opposed vaccination in the nineteenth century often invoked bodily autonomy and suspicion of government overreach in language remarkably similar to modern arguments. The consistency across centuries suggests that physician vaccine skepticism is not merely a product of social media or any single controversy but a recurring feature of how some practitioners relate to public health authority.
Gaps in Medical Education
One underappreciated factor is that medical schools do not always teach vaccinology in depth. In a pilot study at a U.S. medical school, 79% of students reported that the curriculum insufficiently covered vaccine-related topics.12PubMed Central. Do Not Throw Away Your Shot: Pilot Study in Improving Medical School Curricula Through Focused Vaccine Education A broader cross-sectional survey found that about a third of medical students across multiple institutions felt insufficiently prepared for patient questions about vaccination, with even higher proportions feeling unprepared to communicate about side effects (66%) or to respond to vaccine hesitancy (58%).13American Journal of Preventive Medicine. Vaccine Education of Medical Students: A Nationwide Cross-sectional Survey
A study of Romanian medical universities echoed these findings: while the historical context of immunization and core immunology were well covered, practical aspects of vaccine administration were less emphasized, and there was a gap between what faculty thought the curriculum delivered and what students felt they had actually learned.14PubMed Central. Assessing and bridging the gap in vaccinology education: insights from Romanian medical universities None of this means that training gaps cause doctors to become anti-vaccine. But a physician who leaves medical school without robust knowledge of how vaccines work, how to talk about adverse events, or how to engage with skeptical patients is more vulnerable to misinformation later, and less equipped to counter it in their practice.
The Social Media Megaphone
A physician with anti-vaccine views who posted a letter to a local newspaper in 1995 reached a few hundred people. That same physician posting on social media today reaches thousands or millions, and credentials make the message travel faster. An analysis of anti-vaccine communities on Twitter (now X) found that users perceived as experts, including those with medical or scientific credentials, were about 1.4 times more likely to be retweeted on their median post than non-experts, and they were overrepresented among the most central, highly connected users in the network.15PubMed Central. Perceived experts are prevalent and influential within an antivaccine community on Twitter Credentials function as a signal booster. A layperson making the same claim gets less traction.
Some anti-vaccine physicians have built organizations around their views. The group Physicians for Informed Consent, registered as a U.S. nonprofit, reported total earnings of about $165,000 in 2019, drawn from membership dues and donations. Membership dues for doctors ran up to $350 per year.16Journal of Communication. The political economy of digital profiteering: communication resource mobilization by anti-vaccination actors While not large in absolute terms, this kind of institutional scaffolding gives anti-vaccine physicians a platform, legal resources, and a veneer of organizational legitimacy that individual social media accounts lack.
How Vaccine-Skeptical Doctors Affect Patient Decisions
When a doctor expresses doubts about vaccines, the effect on patients is real. Research in Switzerland documented an underappreciated phenomenon: parents switching from one doctor to another, often to a provider offering alternative medicine services, when disagreements arose during vaccination consultations. The study highlighted how parents’ experiences of trust and perceived respect for their choices shaped which provider they ultimately chose, and that provider’s stance on vaccines often shaped the child’s vaccination outcome.17PubMed Central. Trust, affect, and choice in parents’ vaccination decision-making and health-care provider selection in Switzerland
The concern runs in the other direction, too. Among pediatricians surveyed about parents requesting spread-out or delayed vaccine schedules, most recognized the request put children at risk for disease (87%) and caused more painful visits (84%). Yet 82% felt that agreeing would build trust, and 80% worried that refusing would cause the family to leave their practice entirely.18Pediatrics. Physician Response to Parental Requests to Spread Out the Recommended Vaccine Schedule That fear is not unfounded, since alternative schedules, once adopted, increase the time a child goes unvaccinated and place heavier demands on the practice.19PubMed Central. Parental vaccine concerns, information source, and choice of alternative immunization schedules The result is a dynamic in which anti-vaccine doctors attract patients who want validation, while pro-vaccine doctors face pressure to compromise on schedules to keep patients from leaving altogether.
On the encouraging side, most physicians who engage with hesitant patients do so constructively. In a study of nearly 300 physicians describing their communication strategies with COVID-19 vaccine-hesitant patients, about 61% focused on vaccine education, and roughly 32% emphasized creating a safe conversational space where patients could express doubts without judgment.20PubMed. Patient concerns and physician strategies for addressing COVID-19 vaccine hesitancy The challenge is that these patient interactions take time, emotional energy, and communication skills that not every physician has been trained in.
How Medical Boards Have Responded
Given the public health stakes, you might expect aggressive regulatory action against physicians spreading vaccine misinformation. The reality is far more restrained. An analysis of more than 3,100 medical board disciplinary proceedings in the five most populous U.S. states found that spreading misinformation to the community was the least common reason for discipline, accounting for just 0.1% of all identified offenses. Patient-directed misinformation was also rare at 0.3%. For context, physician negligence accounted for nearly 29% of disciplinary actions, and inappropriate prescribing was about 14%. When misinformation cases did lead to discipline, the sanctions tended to be relatively light.21JAMA Network Open. Medical Board Discipline of Physicians for Spreading Medical Misinformation
Some states have tried more targeted approaches. California’s medical board, for example, investigated physicians who wrote large numbers of vaccine exemptions, looking at whether the exemptions reflected legitimate medical judgment or were being granted too freely.22BMJ. California’s medical board investigates doctors who write many vaccine exemptions But the broader picture is that medical boards have struggled to draw clear lines between protected clinical opinion and actionable misinformation, and enforcement has been sparse.
Some doctors who hold critical views on vaccines perceive themselves as being on the receiving end of institutional suppression. A qualitative study of researchers and practitioners who described themselves as holding critical or oppositional positions on vaccines documented their reports of defamatory public statements made against them, paper retractions, denial of research grants, calls for dismissal, and in some cases license suspensions. Several participants reported engaging in self-censorship, declining to express views publicly for fear of professional retaliation.23PubMed Central. Suppressing Scientific Discourse on Vaccines? Self-perceptions of researchers and practitioners Whether one views these consequences as justified accountability or unfair silencing depends heavily on how one evaluates the underlying claims these practitioners were making. What the study demonstrates is that vaccine-skeptical physicians experience real professional costs, which can reinforce their sense of being persecuted outsiders and deepen their commitment to the cause.
Professional Identity and the Pressure to Conform
The relationship between being a doctor and supporting vaccines is not just about evidence. It is also about identity. A study exploring how physicians develop attitudes toward vaccine hesitancy through their professional training found that the process of becoming a doctor involves internalizing a value system in which pro-vaccination advocacy is not merely a clinical task but a core component of professional legitimacy. As a result, doctors may consciously or unconsciously distance themselves from anything resembling hesitancy because it conflicts with their professional identity. The study noted that this alignment can suppress personal doubts and also reduce empathy for hesitant patients.24PubMed. Frustrated, hopeless and hesitant: Understanding doctors’ learned attitudes and emotions toward vaccine hesitancy through socialisation theory
This cuts in two directions. On one hand, professional socialization is a powerful force for maintaining the pro-vaccine consensus among doctors. On the other hand, it means that when a doctor does break from that consensus, the social consequences within the profession are severe, which may push dissenting physicians further toward alternative professional communities and media ecosystems where their views are welcomed and amplified. The result can be a kind of sorting: most doctors stay firmly in the pro-vaccine mainstream, while those who leave it find themselves increasingly embedded in anti-establishment networks with little incentive to moderate.
Strategies That Show Promise
Addressing vaccine hesitancy among physicians requires different tools than addressing it in the general public, because the roots are different. A systematic review of interventions aimed at healthcare professionals identified several components that showed promise: educational sessions (both in-person and online), performance assessment and feedback, changes to electronic health records to support vaccination workflows, and role play or simulation exercises. The review noted that simulation and gaming-based approaches were relatively new and had not been widely evaluated, but represented potentially innovative strategies.25European Journal of Public Health. Countering vaccine hesitancy: a systematic review of interventions to strengthen healthcare professionals’ action
A separate systematic review emphasized that effective campaigns need to be tailored to specific settings. What works in a large urban hospital may not work in a rural private practice. The review recommended that hospital and health center managers identify the specific barriers to vaccination in their own environments rather than applying one-size-fits-all approaches, and adopt multi-pronged campaigns combining education, reminders, improved access, and feedback mechanisms.26PubMed Central. Strategies used to improve vaccine uptake among healthcare providers: A systematic review The evidence suggests there is no single intervention that fixes the problem, but that sustained, context-sensitive efforts can shift attitudes and behavior over time.
When the Spillover Reaches Pets
One of the stranger downstream effects of physician anti-vaccine activism is its impact on veterinary medicine. A survey of American and Canadian veterinarians found a positive correlation between the presence of an organized anti-vaccine movement against mandatory childhood vaccination in a community and the number of pet owners who resisted or questioned vaccines for their dogs and cats. The implication is that skepticism seeded by human-medicine anti-vaccine messaging does not stay contained within human medicine; it bleeds into how people think about animal health as well.27PubMed Central. American and Canadian veterinarians’ perceptions on dog and cat core vaccination rates and the impact of the human medicine anti-vaxx movement on veterinary medicine Veterinarians now find themselves fielding the same kinds of conversations about “natural immunity” and adverse-event fears that pediatricians have dealt with for years, sometimes from the very same clients. The phenomenon underscores how medical credentialing lends weight to ideas that travel far beyond the context in which they were originally expressed. When a physician questions human vaccines on a social media platform, the message does not stay in a box labeled “human medicine.” It reshapes how people think about biological risk across domains.