£3 million and one sample: how England's sewage becomes an early warning system
What happened
On 23 September 2026, the UK Health Security Agency (UKHSA) announced that it is expanding the way it tests England's sewage for signs of disease. The new programme is called PRISM. It stands for Pathogen Risk Intelligence through Surveillance and Modelling. It builds on a smaller pilot that UKHSA started in 2025 to see whether new lab technology could spot dangerous viruses in wastewater. That pilot worked well enough to grow. Over the next two years, £3 million from the UK Integrated Security Fund will let UKHSA laboratories scale the work up into an England-wide system. Two things are new. First, the scale: testing will reach beyond sewage treatment works to targeted hospital wastewater sites and busy public places such as transport hubs. Second, the approach. UKHSA describes PRISM as 'pathogen-agnostic'. In plain terms, the old way of working meant testing a sample for one specific germ you were already looking for. PRISM takes one sample and runs many different tests on it. UKHSA calls this 'sample once, test many'. The same bottle of wastewater can feed public health monitoring, national biosecurity work and antibiotic resistance tracking at the same time.
Why this matters
Most of us never think about what happens to what we flush away. But sewage carries traces of almost everyone in an area, including people who feel fine, people who never see a doctor, and people whose illness is never tested or recorded. That makes wastewater a rare thing in public health: a way of taking the temperature of a whole community at once, without asking anyone to do anything. The UK already does this for polio. Wastewater testing in London picked up poliovirus in 2022, which led to a catch-up vaccination campaign for children. That is the model PRISM is widening. The practical value is time. If a new or unusual germ is spreading, the first hospital admission is usually a late signal. By then the germ has been circulating for a while. Finding it in sewage first can buy days or weeks, and in an outbreak that is a lot. There is a closer-to-home benefit too. PRISM will track the seasonal illnesses that pile pressure on the NHS every winter, and one of the first is norovirus - the winter vomiting bug. Knowing early that norovirus is rising in your region helps hospitals, care homes and schools prepare rather than react.
What the evidence actually says
It is worth being precise here, because the list of viruses in the announcement looks alarming at first glance. UKHSA mentions Crimean-Congo haemorrhagic fever, Ebola, Marburg and Lassa fever. The agency is clear that these viruses have not emerged in the UK. They are on the list because the new technology could, in principle, pick them up early if they ever did arrive. This is preparation, not a warning that something is here. What PRISM has actually done so far is more modest and more useful. During its early development, the surveillance successfully tracked norovirus in wastewater. It could even tell apart different strains circulating in different parts of the country, with help from AI tools. That is a real, tested result rather than a promise. The third strand is antimicrobial resistance, or AMR - germs that our antibiotics and antifungals no longer kill properly. Because PRISM can run several tests on one sample, UKHSA scientists will be able to look for drug-resistant bacteria and fungi in the same wastewater, including hypervirulent Klebsiella pneumoniae and Candidozyma auris. The aim is a clearer country-wide picture of where resistance is spreading. Professor Robin May, Chief Scientific Officer at UKHSA, said: 'The diversity of biological threats we face is growing and we need to continue to innovate in order to stay ahead of that curve. PRISM is a great step in that direction, setting the foundations for a powerful early warning system that will help us respond swiftly in order to protect the public before problems reach our hospitals and communities.' One honest limit: this is a two-year, £3 million investment to build a capability. It is a foundation, in UKHSA's own words - not a finished national alarm system. Nothing published today changes what you should do about your own health.
Qurexa perspective
Two parts of this announcement land close to the work we do every day in Lincolnshire. The first is norovirus. When the winter vomiting bug is circulating, the advice for anyone unwell is to stay at home and away from others - and the people most at risk from it are often the same people who most need their regular medicines. Getting a prescription delivered rather than collected is one small way of keeping a vulnerable household out of a busy pharmacy queue during an outbreak. That is true whoever delivers it. The second is antibiotic resistance. Surveillance shows where resistance is spreading; what slows it down is millions of ordinary decisions about how medicines are taken. Finishing a course as prescribed, not saving leftover antibiotics 'for next time', and not taking someone else's - these are the unglamorous parts. Medication adherence support is a large part of what we do, and this is the side of AMR that individuals genuinely can affect.
Practical advice
There is nothing here you need to act on urgently. But there are a few sensible things worth doing as winter approaches. If you get sick with vomiting or diarrhoea, stay off work or school until 48 hours after your symptoms stop. Norovirus spreads very easily, and this single step does more than anything else to stop it. Wash your hands with soap and warm water, especially after using the toilet and before handling food. Alcohol hand gel is not reliable against norovirus - soap and water are better. Do not visit relatives in hospital or a care home while you have symptoms, or in the 48 hours afterwards. It is hard to stay away, but it protects the people least able to cope with it. If you are prescribed antibiotics, take the full course exactly as your prescriber tells you. Never keep leftovers for another time, and never take antibiotics prescribed for someone else. Take unused medicines back to a pharmacy rather than binning or flushing them. Take up the vaccines you are offered. Flu and COVID-19 jabs in autumn are still the strongest protection most adults have against a difficult winter, and your pharmacist can tell you what you are eligible for. If you are struggling to keep on top of several medicines, ask your pharmacist about a review. It is free, it takes very little time, and most people do not realise they can just ask.
What to know
PRISM is a two-year, £3 million expansion of England's wastewater testing, funded through the UK Integrated Security Fund. It extends sampling to targeted hospital sites and high-footfall locations such as transport hubs. Its 'sample once, test many' approach means one sample can support outbreak detection, biosecurity and antibiotic resistance monitoring together. The rare viruses named in the announcement - Ebola, Marburg, Lassa fever and Crimean-Congo haemorrhagic fever - have not emerged in the UK. They are listed as threats the system could help detect early, not as current risks. What PRISM has already demonstrated is norovirus tracking, including telling apart strains circulating in different regions. This is a surveillance programme, not a treatment or a warning. It changes what public health teams can see, not what you need to do today. Sources: UK Health Security Agency (GOV.UK), 'UKHSA expands wastewater surveillance to strengthen "early warning system" for dangerous pathogens', 23 September 2026, https://www.gov.uk/government/news/ukhsa-expands-wastewater-surveillance-to-strengthen-early-warning-system-for-dangerous-pathogens ; The Pharmacist, 'UKHSA to test wastewater monitoring as virus early warning system', 2 September 2025, https://www.thepharmacist.co.uk/in-practice/ukhsa-to-test-wastewater-monitoring-as-virus-early-warning-system/ This article is for general information and does not replace advice from a doctor, pharmacist or other qualified healthcare professional. If you are unwell or have questions about your medicines or vaccinations, speak to your GP practice or community pharmacist.
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