Company lists · Data refreshed September 2026
Top 25 Immunization programs worldwide
RevenueBase identified 325 immunization programs worldwide as of September 2026 and tracks 23,203 professional contacts across them, including 2,255 with verified work emails. Brazil is the largest market and Sao Paulo the largest hub.
This list covers immunization programs worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for immunization programs follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest immunization programs worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 824 contacts → | ||||
Indirect evidence “Gavi, the Vaccine Alliance is a public-private partnership that helps vaccinate half the world’s children against some of the world’s deadliest diseases.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 381 contacts → | ||||
Indirect evidence “We build technology to manage every aspect of vaccinations from start to finish.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 103 contacts → | ||||
Indirect evidence “A S&A Imunizações,(fundada em 2016), é uma das maiores e mais consolidadas referências em Campanhas de Vacinação Corporativa no Brasil- Nossa missão é transformar a vacinação de…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 73 contacts → | ||||
Indirect evidence “Every kid should be vaccinated.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 71 contacts → | ||||
Indirect evidence “VNVC - HỆ THỐNG TRUNG TÂM TIÊM CHỦNG CHO TRẺ EM & NGƯỜI LỚN.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 57 contacts → | ||||
Indirect evidence “Missão Oferecer assistência humanizada com máxima qualidade para realização de Campanhas de Vacinação in company, adequando e personalizando-a de acordo com a necessidade de cada…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 39 contacts → | ||||
Indirect evidence “A Vacivitta é uma rede de clínicas de vacinação para todas as idades e possui uma equipe médica atualizada com tudo o que existe de mais recente em pesquisa e tecnologia nos…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 31 contacts → | ||||
Indirect evidence “Vacinar Centro Imunização is a company based out of Brazil.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 30 contacts → | ||||
Indirect evidence “Vaccinations are one of our greatest public health successes to date, averting 2-3 million child deaths every year.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 30 contacts → | ||||
Indirect evidence “Vaccinova – Vi finns där du är!” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 27 contacts → | ||||
Indirect evidence “A VACCINE CARE - Clínica de Vacinas é uma empresa jovem com administradores experientes e comprometidos com o crescimento vertical de seus empreendimentos.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 22 contacts → | ||||
Partial evidence “The Association of Immunization Managers (AIM) is a nonprofit membership association comprised of the directors of the 66 federally funded state, territorial, and local public…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 22 contacts → | ||||
Indirect evidence “Vaccinate Your Family (VYF) is a nonprofit organization founded in 1991 by Former First Lady Rosalynn Carter and Former First Lady of Arkansas Betty Bumpers under the name Every…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 18 contacts → | ||||
Partial evidence “The Arizona Partnership for Immunization (TAPI) is a non-profit, statewide coalition of over 400 members.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 17 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 15 contacts → | ||||
Indirect evidence “En Escudea creemos que vacunarse debe ser un proceso seguro, accesible y fácil de entender.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 14 contacts → | ||||
Indirect evidence “Seattle Visiting Nurse Association (SVNA) is the largest community mass immunizer in Washington State.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 14 contacts → | ||||
Partial evidence “Our vision To reverse infectious disease trends globally by half by the year 2025 and by 100% by the year 2030 through an adoption of Immunization as one of the top important…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 13 contacts → | ||||
Partial evidence “Immunize.org (formerly Immunization Action Coalition) established its website in 1994.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 13 contacts → | ||||
Indirect evidence “VaxWorks Health Services is a trusted and well-respected provider of workplace vaccination clinics across Australia.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 13 contacts → | ||||
Indirect evidence “VaxPro makes protecting your people effortless.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 12 contacts → | ||||
Indirect evidence “A CLINIVAC é uma clínica especializada em imunizações – do recém-nascido ao adulto na melhor idade – que conta com uma equipe de médicos pediatras, infectologistas e enfermeiras…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 12 contacts → | ||||
Indirect evidence “The National Immunisation Office is responsible for managing vaccine procurement and distribution, developing training and communication materials for the public and health…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 11 contacts → | ||||
Partial evidence “The Immunization Partnership (TIP) works to significantly increase state immunization rates by being a source of leading research, industry expertise and specialist knowledge…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 11 contacts → | ||||
Partial evidence “Immunize El Paso is a vital healthcare resource for immunizations serving those who do not have a traditional medical home or are otherwise unable to obtain timely immunization.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: immunization programs. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names immunization programs.
- Partial evidence
- Its own public description names part of immunization programs, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name immunization programs. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 325 immunization programs worldwide
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Immunization programs worldwide at a glance
As of Sep 20, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among immunization programs, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for immunization programs are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “immunization programs”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names immunization programs), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among immunization programs, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 2,255 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Immunization programs by location
2 lists · largest firstEvery Immunization programs list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names immunization programs, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many immunization programs are there worldwide?
RevenueBase identified 325 immunization programs worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Gavi, The Vaccine Alliance, headquartered in Le Grand-Saconnex, tops this list with the largest team on record.
Which country has the most immunization programs?
Brazil leads with 138 companies, followed by the United States (51). Every immunization programs list by country and city is linked on this page.
Which city has the most immunization programs?
Sao Paulo leads with 16 headquartered companies, followed by Rio De Janeiro (8) and Campinas (5).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,255 verified decision-maker contacts tracked across these 325 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.