World Immunization Week 2026

World Immunization Week takes place every year in the last week of April and was officially established by the World Health Organization (WHO) in 2012. The World Immunization Week will be held for the 15th time from 24 to 30 April 2026. Aim is to raise awareness of the need for collective action and promote the use of vaccines to prevent people of all ages from diseases. The campaign seeks to save lives by increasing global vaccine coverage and ensuring that people understand the critical role immunizations play in public health. Immunization saves millions of lives every year and is widely recognized as one of the world’s most successful health interventions. Yet, there are still nearly 20 million children in the world today who are not getting the vaccines they need, and many miss out on vital vaccines during adolescence, adulthood and into old age.

World Immunization Week

24 to 30 April 2026

Vaccines have saved at least 154 million lives over the past 50 years, driving major improvements in infant survival and nearly eradicating diseases like smallpox and polio. That’s 6 lives a minute, every day, for five decades. Despite this progress, millions still lack access to essential vaccines, and continued efforts are needed to protect people of all ages from preventable diseases. Under the theme “For every generation, vaccines work” World Immunization Week 2026 calls for the use of vaccines to protect people of all ages against disease and to ensure that everyone, everywhere has equitable access to life-saving immunization services.

World Immunization Week theme 2026:

For every generation, vaccines work

Let’s achieve this by:

Improving access to vaccines, especially in underserved and remote areas

Strengthening health systems (trained staff, reliable supply chains)

Using data to identify and close immunization gaps

Raising awareness through education and public campaigns

The World Immunization Week focuses on several key objectives:

Highlighting the role of vaccines: Vaccines are one of the most effective and cost-efficient ways to prevent serious diseases like measles, polio, and influenza, among others.
Increasing vaccine coverage: By promoting vaccination programs, the campaign encourages people, especially in underserved regions, to get vaccinated, thereby reducing preventable diseases.
Combating misinformation: World Immunization Week also seeks to counter misinformation about vaccines and promote confidence in their safety and effectiveness.
Advocating for stronger health systems: It emphasizes the importance of strong health systems that can ensure equitable access to vaccines for everyone, including those in remote and vulnerable populations.

For over 200 years, vaccines have protected us against diseases that threaten lives and prohibit our development. With their help, we can progress without the burden of diseases like smallpox and polio, which cost humanity hundreds of millions of lives

Whilst vaccines aren’t a silver bullet, they will again help us progress on a path to a world where we can be together again.

Vaccines themselves continue to advance, bringing us closer to a world free from the likes of TB and cervical cancer, and ending suffering from childhood diseases like tetanus and measles.

Investment and new research is enabling groundbreaking approaches to vaccine development, which are changing the science of immunization forever, bringing us closer still to a healthier future.

Source: WHO

More about the history of vaccination:

The story of vaccines did not begin with the first vaccine–Edward Jenner’s use of material from cowpox pustules to provide protection against smallpox. Rather, it begins with the long history of infectious disease in humans, and in particular, with early uses of smallpox material to provide immunity to that disease.

Evidence exists that the Chinese employed smallpox inoculation (or variolation, as such use of smallpox material was called) as early as 1000 CE. It was practiced in Africa and Turkey as well, before it spread to Europe and the Americas.

Edward Jenner’s innovations, begun with his successful 1796 use of cowpox material to create immunity to smallpox, quickly made the practice widespread. His method underwent medical and technological changes over the next 200 years, and eventually resulted in the eradication of smallpox.

Louis Pasteur’s 1885 rabies vaccine was the next to make an impact on human disease. And then, at the dawn of bacteriology, developments rapidly followed. Antitoxins and vaccines against diphtheria, tetanus, anthrax, cholera, plague, typhoid, tuberculosis, and more were developed through the 1930s.

The middle of the 20^th century was an active time for vaccine research and development. Methods for growing viruses in the laboratory led to rapid discoveries and innovations, including the creation of vaccines for polio. Researchers targeted other common childhood diseases such as measles, mumps, and rubella, and vaccines for these diseases reduced the disease burden greatly.

Innovative techniques now drive vaccine research, with recombinant DNA technology and new delivery techniques leading scientists in new directions. Disease targets have expanded, and some vaccine research is beginning to focus on non-infectious conditions such as addiction and allergies.