Every Thursday morning, I receive an email from the World Health Organization with an update on the status of polio eradication. It contains a wealth of information, country by country: where and how immunization campaigns are being conducted, how many millions of children are being vaccinated, and where environmental
surveillance has found evidence of circulating virus.
But every week, when that email appears in my inbox, my heart seems to stop for just a moment until I read the first few lines – and learn whether a child was paralyzed by wild poliovirus that week.