Polio can be circulating through a community long before anyone is paralyzed. Monitoring sewage for the virus lets public health officials short-circuit this 'silent transmission.'
Pakistan had only eight new diagnoses of polio in 2017. The virus' days look numbered – but health workers have their work cut out for them to eradicate the devastating disease once and for all.
Social media rumours are putting Nigeria's vaccination campaigns at risk.
Current plans to eradicate polio mean keeping the virus alive – and risk restarting the epidemic.
Vaccination is not to be taken for granted.
A new polio outbreak in Nigeria has hampered the country's efforts to be declared polio free by 2017.