In February 2022, a year and a half after the continent was declared indigenous wild poliovirus-free, the virus resurfaced in south-eastern Africa. As the Global Polio Eradication Initiative kicks off pledging to fund the 2022-2026 strategy, VaccinesWork dives into what exactly happened in Malawi and Mozambique, where eight children have been paralysed by an infectious threat that really isn’t over until it’s over everywhere.