Right now, UKHSA urges anyone who is not fully vaccinated to get immunised Read ajmurugesu’s in-depth explainer on polio:
Beckton sewage treatment worksNevertheless, some degree of local transmission is expected to have taken place, with the virus having the potential to spread and cause severe disease, particularly among the unvaccinated.Polio is a viral disease that mostly affects children
Sewage samples are regularly tested in the UK for poliovirus and other pathogens, such as norovirus andOne to three “vaccine-like” polioviruses are detected each year. These were previously one-off findings that occurred after a person received a live oral polio vaccine and shed the virus in their faeces. These oral vaccines aren’t administered in the UK.
, but are given in parts of the world that are actively fighting the infection, such as Afghanistan and Pakistan. Unlike vaccines that are administered via injection, oral vaccines are relatively cheap and easy to administer.of the oral vaccine is it can lead to vaccine-derived poliovirus in poorly immunised populations. This vaccine works by administering a weakened version of the live poliovirus.
According to David Salisbury at the World Health Organization’s Global Commission for Certification of Polio Eradication, these mutations “imply that it has circulated amongst individuals, including possibly those who have been vaccinated with inactivated polio vaccine”.This circulation may have occurred in the country where the person received the live oral vaccine or possibly in the UK, but without causing symptoms.
“There have not been any paralytic cases so far,” said Hunter. “So at the moment there is unlikely to be any immediate risk to public health, but if such transmission continues then the risk is that the virus will eventually evolve into one that does cause paralysis.
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