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A concerning outbreak of measles in London has led to over 300 suspected cases, highlighting a significant public health challenge. An internal report from the UK Health Security Agency (UKHSA) reveals that, since the beginning of 2026, there have been 340 suspected cases of the virus, with 34 confirmed instances linked to a single school in Enfield. This surge in cases has raised alarms among health officials, particularly given the recent decline in vaccination rates across the capital.
Outbreak Overview
The leaked UKHSA report indicates that the measles outbreak primarily affects children under the age of 10, a demographic particularly vulnerable due to low vaccination uptake. The data shows that from January 20 to February 7, 34 confirmed cases were recorded at one school in North London, contributing to the larger outbreak.
As of Thursday, UKHSA reported a total of 104 confirmed measles cases in London, with a troubling 71 of these occurring in the boroughs of Enfield and Haringey. However, the internal document suggests that the actual number of confirmed cases is much higher, with 123 confirmed, 57 classified as “probable,” and 117 as “possible.”
Vaccination Rates in Decline
The report underscores a concerning trend: vaccination rates for measles are dropping across London. Currently, children in the UK receive the first dose of the measles, mumps, rubella, and varicella vaccine (MMRV) at 12 months, followed by a second dose at 18 months. Dr Yimmy Chow, the UKHSA’s deputy director for the London region, emphasised the seriousness of the situation, stating, “The measles outbreak in north London continues, and while children remain unvaccinated, the risk of it spreading to other areas remains a real threat.”
Measles is an exceptionally contagious disease that can lead to serious complications, including pneumonia, meningitis, and even death. Dr Chow added, “Every year, we see children in hospital suffering needlessly, sometimes leading to long-term complications.”
Demographics of the Outbreak
The majority of measles cases identified between January 27 and February 24 were among children aged one to four, with 37 confirmed cases in this age group. Additionally, 22 cases were recorded in children aged five to eleven, with 42 of the total cases occurring in the most deprived areas of London.
The report highlights a broader trend across England, revealing 1,117 cases of measles from January 1, 2024, to February 23, 2026, with London accounting for a significant proportion. Alarmingly, vaccination uptake among children is at record lows, with only 78 per cent of children aged one to four and 90 per cent of those aged five to eleven having received their vaccinations.
Calls for Action
In response to the rising number of cases, Dr Josephine Sauvage, chief medical officer of the North Central London Integrated Care Board, has urged parents to ensure their children are vaccinated. “It is obviously concerning that cases are still rising, but there is something we can all do to protect our loved ones and ourselves, which is to get the vaccine,” she stated.
Local healthcare providers are actively reaching out to unvaccinated families, offering additional appointments and out-of-hours clinics to facilitate access to vaccinations.
Earlier this year, the UK lost its measles elimination status, primarily due to vaccination rates falling below the World Health Organisation’s target of 95 per cent coverage to achieve herd immunity. Areas like Hackney have alarmingly low vaccination rates, with only 65.3 per cent of two-year-olds receiving the necessary jab.
Why it Matters
The resurgence of measles cases in London is a stark reminder of the importance of vaccination in public health. As the outbreak unfolds, it poses significant risks not only to unvaccinated children but also to the broader community. With measles being a highly contagious disease, the decline in vaccination rates could lead to further outbreaks, putting vulnerable populations at risk. Public health authorities must engage effectively with communities to raise awareness and encourage vaccination, as this is the most effective means of preventing the spread of this preventable disease. Immediate action is crucial to safeguard the health of children and the community at large.
