There has been civil strife, spanning more than two decades in some countries and recurrent natural disasters in the Horn of Africa (HoA). Samuel Okiror 1*, Abraham Mulugeta 2, Iheoma Onuekwusi 3, Fiona Braka 4, Sylvesta Malengemi 5, John Burton 6, Rustam Hydarav 7, Brigitte Toure 7, Bob Davis 8, Carolyn Gathenji 1, Chidiadi Nwogu 1, Joseph Okeibunor 9ġWHO Horn of Africa Coordination Office (HOA), Nairobi KENYAĩWHO Regional Office for Africa (WHO AFRO) In 2022 so far, there have been 177 cases, after major efforts to get polio vaccination campaigns back on track.īut the wastewater findings are still a wake-up call for parents with one key message, according to scientists around the world, including David Heymann, epidemiologist at London School of Hygiene and Tropical Medicine: Protect children by getting them vaccinated.Polio Outbreak Investigation and Response in The Horn of Africa: 2013-2016 In 2020, there were 1,081 vaccine-derived polio cases, around three times as many as the previous year. Vaccine hesitancy was a growing problem before the pandemic, then COVID-19 caused the worst disruption to routine immunization in a generation, according to the United Nations.
#POLIO OUTBREAK DRIVER#
WHY NOWīut experts agree that the major driver behind both vaccine-derived and wild polio outbreaks remains under-vaccinated populations, said Derek Ehrhardt, global polio lead at the United States Centers for Disease Control and Prevention (CDC). While countries including the Britain and the United States no longer use this live vaccine, others do - particularly to stop outbreaks - which allows for global spread, particularly as people began to travel again after COVID-19, experts said. In under-vaccinated communities, this can then spread and mutate back to a harmful version of the virus. After children are vaccinated, they shed virus in their faeces for a few weeks. It stems from the use of an oral polio vaccine containing weakened live virus. While vaccine-derived polio is almost unheard of in the above locations, it is a known - albeit rare - threat in other countries, causing outbreaks every year, including 415 cases in Nigeria in 2021. Genetically similar virus has also been found in Jerusalem, Israel, and scientists are working to understand the link, the Global Polio Eradication Initiative (GPEI) said. It is this second form detected in wastewater in the British capital, London, and in New York in the United States, with one case of paralysis reported in New York state. Alongside the wild-type outlined above, there are also rare cases of what is known as vaccine-derived polio. But this year, imported cases were also found in Malawi and Mozambique, the first in those countries since the 1990s. Globally, the wild form of the disease has almost disappeared.Īfghanistan and Pakistan are now the only countries where the highly infectious disease, spread mainly through contact with faecal matter, remains endemic. There is no cure, but since a vaccine was found in the 1950s, polio is entirely preventable. Around one in 200 infections leads to irreversible paralysis, and among those patients, up to 10% die. Affecting mainly children under five, it is often asymptomatic but can also cause symptoms including fever and vomiting. Polio terrified parents around the world for the first half of the 20th century. LONDON, Aug 15 (Reuters) - Polio, a deadly disease that used to paralyze tens of thousands of children every year, is spreading in London, New York and Jerusalem for the first time in decades, spurring catch-up vaccination campaigns.
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