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Articles on Poliovirus

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For much of the 20th century, Americans were used to seeing people bearing the signs of past polio infection. Genevieve Naylor/Corbis via Getty Images

‘Got polio?’ messaging underscores a vaccine campaign’s success but creates false sense of security as memories of the disease fade in US

Polio vaccines have been a massive public health victory in the US. But purely celebratory messaging overlooks the ongoing threat if vaccination rates fall.
Critical-care patients in the emergency polio ward at Haynes Memorial Hospital in Boston in August 1955. Associated Press photo

Fears of a polio resurgence in the US have health officials on high alert – a virologist explains the history of this dreaded disease

Health officials say the new case of polio in New York state and the presence of poliovirus in the municipal wastewater suggests that hundreds more could already be infected with the disease.
Experts estimate that close to 90% of the U.S. population must be vaccinated to reach herd immunity for COVID-19. David McNew/AFP via Getty Images

What is herd immunity? A public health expert and a medical laboratory scientist explain

Vaccination campaigns like the ones that eventually eliminated polio and measles in the United States required decades of education and awareness in order to achieve herd immunity in the U.S. population.
Monitoring sewage for virus allows for a quick public health response if any polio is detected. AP Photo/Matt Rourke

Sewage surveillance is the next frontier in the fight against polio

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.’
What will it take to finish polio off in the last three countries where it persists? AP Photo/B.K. Bangash

Inching closer to a world without polio

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.

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