This deeply unpleasant disease is a problem in other parts of the world
But OPV is still used in many other parts of the world. That’s partly because it’s cheaper, and partly because, as an oral pill rather than an injection, it’s easier to administer. The likeliest explanation for the arrival of polio in our wastewater is via someone who was given the vaccine as a child in another country and subsequently moved here.
But this is a reminder that this deeply unpleasant disease is still a problem in parts of the world. In Sub-Saharan Africa and south-western Asia dozens of children were paralysed by it in 2021 alone. We came extremely close to eliminating polio, but some missteps – including the use of a vaccine that can, in rare cases, lead to the reemergence of the disease – have stalled progress.
And the main story of polio is one of success. When I was born in 1980, there were more than 50,000 children paralysed by the disease worldwide. For the past 20 years, that figure has been in the hundreds. The pandemic has slowed our progress, and a lack of wastewater surveillance in much of the world means that, too often, we only know it’s there when a child is abruptly paralysed. But nonetheless there has been great progress.
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