Every year, the World Health Organization (WHO) selects a priority area of global public health concern as the theme for World Health Day, which falls on 7 April. The date of 7 April marks the anniversary of the founding of WHO in 1948. World Health Day 2026 - Together for health. Stand with science The theme for 2026 “Together for health. Stand with science” celebrates the power of scientific collaboration to protect the health of people, animals, plants, and the planet. The year‑long campaign spotlights both scientific achievements and the multilateral cooperation needed to turn evidence into action. In a world facing complex health threats, WHO calls on everyone to stand with science – by engaging with evidence, facts, and science-based guidance to protect health. Key messages Science powers health - The future will be shaped based on how we develop and practice science-led approaches for the health of all – not only humans, but also animals, plants, ecosystems and the entire planet – through the One Health approach. Science serves everyone, everywhere - WHO and its partners work around the clock to generate scientific knowledge on key health priorities from healthy diets to water, sanitation, vaccines and medicines, infections, chronic conditions and mental health; sharing evidence, strengthening countries’ research capacities and systems for more equitable access to health care. Be part of this work, contributing with experiences from you and your community’s perspective, to ensure science-led public health benefits more people to guide future health policies. Source : World Health Organisation