-
UN says new polio outbreak in Sudan caused by oral vaccineSeptember 2, 2020 -
COVID-19 measures could disrupt rare polio-like diseaseAugust 4, 2020 -
Pakistan wraps up anti-polio drive amid surge in casesJuly 24, 2020 -
The Latest: COVID-19 cases tick up in northwest China cityJuly 20, 2020 -
China firm uses workers to 'pre-test' vaccine in global raceJuly 16, 2020