By Ibrahim Happiness
Every year from April 24 to 30, the world marks World Immunisation Week, a global campaign coordinated by the World Health Organisation (WHO) to highlight one of the most effective public health tools ever developed: vaccines. In 2026, the campaign comes with renewed urgency as countries work to close immunity gaps, restore routine vaccination disrupted in recent years, and protect millions of children and adults from preventable diseases.
This year’s theme, “For every generation, vaccines work,” underscores a simple but powerful reality: immunisation is not only for infants. Vaccines protect people throughout life, from newborn babies receiving their first doses, to adolescents, pregnant women, healthcare workers, and older adults needing booster or age-specific protection. It is a reminder that vaccines have served families for generations and remain central to a healthier future.
Globally, vaccines have transformed human survival. WHO estimates that immunisation has saved more than 150 million lives over the last 50 years, with most of those lives saved being those of infants. Vaccination has reduced deaths from diseases such as measles, polio, tetanus, diphtheria and whooping cough, while preventing lifelong disabilities and severe complications that once devastated communities. Public health experts note that vaccines are among the most cost-effective investments any nation can make because they prevent illness before it starts, reduce pressure on hospitals, and strengthen productivity.
Yet despite this progress, millions of children worldwide still miss out on essential vaccines each year. The reasons vary by country: poverty, insecurity, displacement, weak health systems, long travel times to clinics, shortages of trained health workers, and the spread of misinformation. When vaccination rates decline, diseases quickly return. Recent outbreaks of measles and other vaccine-preventable illnesses in several parts of the world have shown how fragile progress can be.
In Nigeria, World Immunisation Week is particularly significant. Africa’s most populous country has made progress in expanding routine immunisation through the National Primary Health Care Development Agency (NPHCDA), state governments, donor partners, and frontline health workers. Vaccines for children are provided free through public health facilities, and campaigns against polio, measles, yellow fever and meningitis have helped protect millions.
However, challenges remain substantial. Many rural and hard-to-reach communities still struggle with access to health centres. Insecurity in parts of the country continues to disrupt outreach services. Urban slums also face low coverage due to population movement and poor health infrastructure. In some communities, false claims about vaccine safety continue to create hesitation among parents.
Nigeria’s Coordinating Minister of Health and Social Welfare, Muhammad Ali Pate, has repeatedly stressed in 2026 that strengthening primary healthcare and expanding routine immunisation are key pillars of the federal government’s health reform agenda. He has called for stronger state-level accountability, improved cold-chain systems, and deeper community engagement to ensure that no child is left behind. According to the minister, immunisation is not merely a health intervention but an investment in national development, because healthy children are more likely to learn, grow, and contribute productively to society.
The Executive Director of the National Primary Health Care Development Agency, Muyi Aina, has also emphasised the importance of reaching zero-dose children, those who have never received a single routine vaccine. He noted that Nigeria’s progress will depend on better data systems, mobile outreach teams, local partnerships, and trust-building with communities.
International partners have echoed similar concerns. UNICEF and World Health Organisation officials in Nigeria have warned that preventable diseases can spread rapidly when immunisation services are missed, especially among vulnerable children. They continue to urge governments and families to prioritise vaccination and routine health checks.
World Immunisation Week, therefore, is more than a symbolic observance. It is a timely reminder that progress in health must be protected. Vaccines only work when they reach people. A child in a remote village deserves the same protection as a child in a city hospital. A mother deserves accurate information, not fear-driven rumours. Health workers deserve the support and tools needed to save lives.
For Nigeria, the path forward is clear: sustained political commitment, increased domestic funding, stronger local healthcare systems, and public trust. Communities, religious leaders, schools, media organisations and civil society all have a role to play in promoting accurate information and encouraging uptake.
As the world marks World Immunisation Week 2026, the message remains straightforward and timeless: vaccines work, they save lives, and they must reach every generation.
Ibrahim Happiness is a 300-level Strategic Communication student at the University of Abuja and an intern with IMPR. She can be reached at: happinessibrahim11@gmail.com.