Sweden Vaccination Rate: Childhood and COVID-19 Uptake

Sweden consistently ranks among the countries with the highest vaccination rates in Europe, with routine childhood immunization coverage hovering in the low-to-mid 90s for most vaccines and COVID-19 primary series uptake reaching roughly 85 percent of the adult population. Those headline numbers, though, smooth over real variation: uptake differs sharply by vaccine type, age group, geography, and socioeconomic background. Understanding Sweden’s vaccination landscape means looking beyond the averages and into the structural, cultural, and demographic forces that shape who gets vaccinated and who does not.

A Century of Routine Immunization

Sweden’s national childhood immunization program has roots stretching back more than a hundred years. Routine vaccination against diseases like measles, pertussis, mumps, and polio has been part of the country’s public health infrastructure for decades, and the cumulative effect is enormous. One modeling study estimated that since the introduction of these routine programs (beginning as early as 1910 for some diseases), over 1.5 million reported cases of measles, pertussis, mumps, and polio combined were averted, with polio seeing the most dramatic decline: roughly 99 percent of expected cases prevented.¹

The measles-mumps-rubella (MMR) vaccine, introduced in Sweden in 1982 as a two-dose schedule, illustrates how quickly high coverage can shift disease dynamics. Within the first few years of the program, over 90 percent of 18-month-olds and close to 90 percent of 12-year-olds were receiving the combined vaccine, and measles incidence dropped steeply.² That initial success set the template for Sweden’s approach: universal access through a well-funded child health services system, no mandatory vaccination laws, and high voluntary uptake driven largely by trust in public institutions.

Coverage has not been perfectly steady, though. Around 2001, researchers noticed a dip in MMR vaccination among two-year-olds. A closer look at actual vaccination dates in one county revealed that about half the apparent drop was parents postponing vaccination by up to a year and a half, rather than refusing it outright. The surveillance system at the time overestimated on-time coverage and missed delayed doses entirely.³ The episode highlighted a recurring challenge in any high-coverage country: even small shifts in the timing of vaccination can temporarily expand the pool of unprotected children and create windows for outbreaks sparked by imported cases.

Why Coverage Stayed High During COVID-19

When the pandemic hit in early 2020, many countries saw childhood vaccination programs disrupted as clinics closed or parents avoided healthcare settings. Sweden was largely spared that disruption. An assessment of Swedish child health services found that routine childhood immunization coverage held steady during the early pandemic, a resilience the researchers attributed to several factors: a long tradition of universal child health services, trusted relationships between families and local child health nurses, well-established communication channels among stakeholders, and the fact that child health services remained mostly open throughout.⁴

This is worth pausing on, because it says something about the institutional architecture behind Sweden’s vaccination rates. The country does not mandate vaccines for children. Instead, the child health system builds uptake through accessibility, consistency, and personal relationships between nurses and families. When an external shock like a pandemic hit, those relationships did not evaporate. Parents kept bringing their children in because the system they trusted kept its doors open.

COVID-19 Vaccine Uptake Across Age Groups

Sweden’s COVID-19 vaccination campaign followed a pattern broadly similar to other Nordic countries, with high overall uptake but clear variation by age group and dose number. By late 2021, about 82 percent of the Swedish population had received at least one dose, and roughly 74 percent were fully vaccinated a year into the campaign.⁵

Among older adults, initial uptake was very strong. A nationwide study of vaccination coverage in people aged 70 and over found that first- and second-dose coverage ranged from 94 to 98 percent across Sweden’s 21 counties. But uptake fell steadily with each subsequent booster: third-dose coverage dropped to 90–96 percent, fourth doses to 80–91 percent, fifth doses to 65–83 percent, and by the sixth dose, coverage ranged from just 13 to 47 percent depending on the county.⁶ The pattern of declining booster uptake is not unique to Sweden, but the steepness of the drop between the primary series and later doses is striking even in a country with high baseline trust in vaccination.

Among younger adults, the picture was patchier from the start. A study of the Skåne county population (adults aged 18 and over) found that about 15 percent remained entirely unvaccinated, 23 percent stopped after two doses, and 62 percent received a booster third dose.⁷ Research on young adults specifically found a similar proportion unvaccinated, with about 14 percent of a study cohort of roughly 4,000 people having received no dose at all.⁸

Vaccine effectiveness data from Sweden reinforced the case for multiple doses. In a large population-based cohort of nearly 590,000 individuals, vaccine effectiveness against post-COVID condition rose with each additional dose: about 21 percent after one dose, 59 percent after two, and 73 percent after three or more.⁹ That dose-dependent pattern made the declining booster uptake especially consequential for ongoing disease burden.

Sociodemographic Gaps in Vaccination

Sweden’s overall high vaccination numbers can mask significant disparities. A nationwide register-based study of COVID-19 vaccination found that unvaccinated individuals were disproportionately younger, male, lower-income, not employed, and born outside Sweden. Even after statistical adjustments, the sociodemographic patterning held. An intersectional analysis showed vaccine uptake ranging from as low as 32 percent to as high as 96 percent across different cross-classified subgroups defined by combinations of age, sex, income, employment, and country of birth.¹⁰

That 32-to-96-percent range within a single country is worth sitting with. It means that in certain demographic intersections, Sweden’s vaccine uptake was closer to the levels seen in much lower-income countries than to its own national average. The disparities were not random; they tracked along lines of structural disadvantage.

Among adolescents in Stockholm, the same patterns appeared: lower household education and having both parents born outside Sweden were associated with lower vaccination coverage.¹¹ For older adults, regional differences also emerged over time. While initial first-dose uptake followed a similar trajectory across all 21 Swedish regions, the gaps widened with later booster doses, and larger, more populous regions tended to be slower and have lower final uptake for the fifth and sixth doses.¹²

Trust, Language, and the Limits of Information Strategy

Sweden’s vaccination success has long been attributed in part to high public trust in government institutions. Research during the COVID-19 pandemic bore this out: a comparative study of Sweden and Italy found that perceiving authorities as knowledgeable about the pandemic was associated with roughly double the odds of being vaccinated.¹³ Individual-level knowledge, interestingly, did not show the same association. What mattered was whether people trusted that the people making the recommendations knew what they were talking about.

But trust in authorities is not evenly distributed across the population, and Sweden’s information strategies during the pandemic exposed real gaps. For non-native Swedish speakers in multicultural communities, understanding COVID-related information from authorities was a complicated process. A qualitative study of migrants in two Swedish communities found that the opportunity to receive information in their own language was essential for comprehension, and that trusted community figures, religious organizations, and local health facilities played a critical role in mediating between official messaging and actual understanding.¹⁴

A separate focus group study of foreign-born individuals reached similar conclusions from a different angle: the national information strategy was inadequately adapted for significant portions of the population, and this prevented some people from making informed decisions about vaccination. Participants offered concrete suggestions for improvement, including more oral and culturally adapted communication rather than relying primarily on written Swedish-language materials.¹⁵ Sweden’s communication approach, often praised for its transparency and lack of heavy-handedness, appears to have worked best for the majority-language, majority-culture population and less well for those outside it.

The Pandemrix Episode

Any discussion of vaccination trust in Sweden has to grapple with Pandemrix, the AS03-adjuvanted H1N1 influenza vaccine used during the 2009 pandemic. Sweden ran one of Europe’s most successful mass vaccination campaigns that year, reaching a large share of the population in a matter of weeks. But in the months that followed, reports of narcolepsy, particularly among children and young adults, began to surface.

The link was real. A large population- and registry-based cohort study found a roughly threefold increased risk of narcolepsy diagnosis among vaccinated individuals aged 20 or younger, translating to about four additional cases per 100,000 person-years. Young adults between 21 and 30 had about a twofold increase. The excess risk declined with increasing age and was not detectable in people over 40.¹⁶ A follow-up analysis using first-symptom onset dates showed the risk was concentrated in time as well: roughly 14 times elevated in the first year after vaccination among younger patients, three times elevated in the second year, and undetectable beyond two years.¹⁷

The Pandemrix episode is still cited in public discussions about vaccine safety in Sweden, and it almost certainly contributed to some of the hesitancy seen in later campaigns. Sweden’s health authorities acknowledged the link relatively early and provided compensation to affected families, which may have partially preserved trust. But the episode remains a sensitive reference point, particularly for parents making decisions about childhood immunization. It is a case study in how even a genuine and well-documented adverse event, affecting a small number of people, can shape vaccination attitudes for years afterward.

Adult Vaccines Beyond COVID

Sweden’s high childhood vaccination rates do not automatically translate into strong adult vaccine uptake. Influenza vaccination among older adults has historically been a weak spot. A survey of people aged 65 and over conducted around 1998–2000 found coverage of only about 30 percent, with the main reported reason for non-vaccination being a simple lack of awareness that the vaccine was recommended for them.¹⁸ That figure has improved somewhat since then, but influenza vaccination uptake in Sweden remains well below the levels seen for childhood immunizations.

When influenza and pneumococcal vaccines were offered together to everyone aged 65 and older in Stockholm County in 1999, about 48 percent took up at least one of the vaccines. Those who received both showed meaningful reductions in hospital admissions for influenza, pneumonia, and invasive pneumococcal disease, with the combined protection greater than either vaccine alone.¹⁹ The results underscored the value of bundling adult vaccine recommendations, but the 48 percent uptake figure also showed how much room there was (and still is) to improve.

Tick-borne encephalitis (TBE) is another vaccine-preventable disease where Sweden’s coverage is uneven. TBE is a genuine risk in parts of Sweden, particularly around Stockholm and the coastal and lake regions. A 2013 survey of the greater Stockholm area found that about 53 percent of respondents had received at least one TBE vaccine dose. Cost, lack of perceived risk, and concern about side effects were the most common reasons people gave for not getting vaccinated.²⁰ Being born outside Europe was negatively associated with vaccination, and higher household income predicted higher uptake, suggesting that the out-of-pocket cost of TBE vaccination (it is not included in the publicly funded immunization schedule for most age groups) creates a socioeconomic gradient.

Nationally, the picture was starker. A survey covering 2018 to 2022 found that roughly 52 percent of the general population with known vaccination history were unvaccinated for TBE, with the proportion varying from about 35 percent unvaccinated in the Stockholm area to 75 percent in northern Sweden.²¹ Even among those who did start a TBE vaccination series across Europe, compliance with the full multi-dose schedule was only about 61 percent.²² Unlike childhood vaccines, which are free, centrally tracked, and woven into routine health visits, TBE vaccination requires individuals to seek it out and pay for it, and the coverage numbers reflect that structural difference.

Healthcare Worker Vaccination and Data Gaps

One area where Sweden’s otherwise strong data infrastructure hits a wall is healthcare worker vaccination. A review of immunization policies across the Nordic countries found that while recommendations and guidelines for vaccinating healthcare workers exist, vaccine uptake among this group is not systematically measured in Sweden. Only incomplete estimates were available from two Swedish counties at the time of the study.²³ Without systematic data, it is impossible to say with confidence how well healthcare workers are covered or whether specific campaigns are reaching them. This is an odd blind spot in a country that has invested heavily in population-level vaccination tracking.

Tracking Vaccines at the National Level

Sweden established its National Vaccination Register (SVR) with mandatory reporting for all vaccine doses given within the national immunization program. A validation study comparing the register against a well-functioning administrative data system found high completeness, making it a reliable tool for both surveillance and research.²⁴ The register’s strength is that it captures individual-level vaccination data across the entire population, allowing researchers to identify gaps by age, region, and other demographic variables with precision that most countries cannot match. It is this infrastructure that made the detailed sociodemographic analyses of COVID-19 vaccination uptake possible in the first place.

Catch-Up Vaccination for Newly Arrived Migrants

Sweden has received large numbers of migrants and refugees in recent decades, many from countries where vaccination programs were disrupted by conflict. A comparative policy analysis across 32 European countries found that Sweden had specific guidance addressing incomplete vaccinations for migrants from top sending countries like Syria, Iraq, and Afghanistan. The guidance recommended catch-up vaccination for children born since conflicts began in those countries and acknowledged that adults arriving from these regions were also likely to have incomplete vaccination histories.²⁵

Having a policy on paper and reaching every newly arrived family are different things, of course. The same language barriers and trust deficits documented during the COVID-19 campaign apply to routine catch-up vaccination as well. Sweden’s child health services, with their model of personal nurse-family relationships, are well positioned to reach migrant families with young children. But reaching adults who are no longer in the child health system, who may be navigating a new healthcare system in a language they do not speak, remains a persistent challenge. The gap between Sweden’s carefully designed policies and the lived experience of its most marginalized residents is, in many ways, the central tension running through the country’s vaccination story.