Today marks World Health Day which is observed annually on 7 April.  This year it is being observed under the theme "Together for health. Stand with science". A year long campaign  has been launched to celebrate the power of scientific collaboration to protect the health of people, animals, plants, and the planet. The campaign spotlights both scientific achievements and the multilateral cooperation needed to turn evidence into action - through a strong focus on the One Health approach. Mpho Sithole spoke to the Executive Director of Africa Health Research Institute Professor,  Willem Hanekom.