It took a near tragedy to change Yusuf’s mind to accept immunization. He will never forget the day his first-born daughter Saratu, then two, became dangerously ill from pneumonia - which can be prevented by vaccination. She survived and a decade later Yusuf is an advocate in his own community. “I looked at my little girl and I knew what was going to happen. When I was a young man I saw plenty of children die. I knew how they looked, and it was my little girl that looked that way now. Now if a man’s wife has just had a child, I go and speak to him and tell him why they need to have a vaccine. And they believe me because I am one of them. We work the same jobs, we are from the same villages, and they see that all of my children have been vaccinated.” – Yusuf, father and community immunization advocate, Nigeria. This photo is part of gavialliance photo exhibition “Vaccine Heroes” currently ongoing in Geneva, Switzerland, to celebrate health care workers who work every day to build bright...