This blog post was originally published on Impatient Optimists, by Pascal Barollier, Director of Communications at Gavi, the Vaccine Alliance.

I spent many of my teenage years living in Malawi, enjoying swimming in beautiful Lake Malawi. Wind on to age 30, and I was struggling to get pregnant. Eventually, following illness, I was diagnosed with schistosomiasis by a consultant and colleague at the Liverpool School of Tropical Medicine.