“Vaccines Work – For Every Generation”

European Immunization Week (EIW) is a regional initiative coordinated by the World Health Organization (WHO), aimed at raising public and professional awareness about the key role of immunization as one of the most effective public health interventions. It contributes to the prevention of infectious diseases, reduction of morbidity and mortality, and improvement of population health.

In 2026, European Immunization Week is marked from April 19 to 25 under the slogan: “Vaccines Work – For Every Generation.” This week represents an important opportunity to remind ourselves that vaccines are one of the greatest achievements of modern public health. Every year, they save millions of lives and prevent the spread of dangerous infectious diseases, protecting not only individuals but also the entire community through herd immunity.

Vaccine-preventable diseases such as measles, diphtheria, poliomyelitis, and tetanus were once common causes of severe complications and death, especially among children. Thanks to vaccination, these diseases are now significantly reduced or nearly eliminated in many parts of the world. However, in recent years, their re-emergence has been observed, which is a direct consequence of declining vaccination coverage.

The decrease in vaccination coverage is most often associated with a reduced perception of risk, the spread of misinformation, and the influence of anti-vaccination movements. These factors create conditions for the reappearance of diseases that had already been brought under control.

The history of vaccination began in 1796 with the work of Edward Jenner, who developed the first vaccine against smallpox. This event marked the beginning of modern immunology. More than a century later, in 1980, smallpox was eradicated globally, representing one of the greatest achievements in the history of medicine. Further development of vaccines enabled control of numerous other infectious diseases and significantly extended life expectancy.

Vaccines provide individual protection without the need to contract the disease, while also contributing to herd immunity. This is particularly important for protecting the most vulnerable groups—newborns, the elderly, chronically ill individuals, and people with weakened immune systems. High vaccination coverage is essential for preventing the spread of infections within the community.

Vaccination does not end in childhood but plays an important role throughout life. In adults and people with chronic conditions, vaccines against influenza, COVID-19, pneumococcal infections, tetanus, and diphtheria significantly reduce the risk of severe disease, hospitalization, and death.

The observance of European Immunization Week is a reminder that the benefits of vaccination are the result of long-standing scientific achievements and global efforts. Maintaining high vaccination coverage remains crucial to preventing the return of controlled diseases and protecting public health.

This week serves as a call to all citizens—to stay informed, follow national recommendations, and contribute to the collective protection of the health of the entire population.

 European Immunization Week-(PDF)