Nearly 500 measles cases confirmed in UK outbreak as children most at risk

A measles outbreak is sweeping across the UK in 2026, with 477 laboratory-confirmed cases recorded between January and late April

Brits are grappling with a surge in measles cases, with nearly 500 confirmed infections this year as the Victorian-era illness continues its spread.

Figures from the UK Health Security Agency reveal 477 laboratory-confirmed cases between January 1 and April 27, representing a significant jump in infections and extending a concerning pattern observed in recent years.

The highly infectious disease, which transmits through coughs and sneezes, had been largely controlled through vaccination programmes.

However, falling rates of MMR jab uptake have been associated with the recent comeback, and the most recent figures show that cases have risen progressively since the beginning of the year.

There were 106 infections in January, climbing to 142 in February and 140 in March, before dipping marginally to 89 cases in April so far. Authorities warn that April’s total is expected to increase further owing to reporting delays, reports the Mirror.

Youngsters are shouldering the heaviest burden of the outbreak. Roughly two-thirds of all cases – 317 out of 477 – have been identified in children aged 10 and under. A further 28 per cent have been detected in people aged 15 and above.

London has become the focal point of the outbreak, representing 58% of all cases. The West Midlands comes next with 23%, while the North West has logged 8%. Every region across England has reported at least one case this year. At local authority level, Enfield has recorded the highest number of infections, with 98 cases – accounting for more than one in five of the national total. Birmingham has logged 74 cases, while Islington has confirmed 44. Other London boroughs, including Haringey, Camden, Barnet and Hackney, have also experienced significant clusters.

Latest figures indicate the virus continues to transmit. In the four weeks from March 30 alone, there have been 101 confirmed cases, although officials caution this is probably an underestimate owing to lags in data reporting. London once more represented the bulk of these, accounting for 66% of cases.

Despite the rapid transmission, no fatalities linked to measles have been reported in England so far this year.

The present surge comes after a turbulent spell for measles infections. Throughout 2024, England recorded 2,911 confirmed cases – the highest yearly figure since 2012. While numbers dropped to 959 in 2025, the disease has not been eradicated and remains in circulation.

Public health experts have repeatedly cautioned that measles can resurge rapidly when vaccination coverage drops beneath the threshold required for herd immunity, generally around 95%. The illness can trigger severe complications, including pneumonia, brain inflammation and, in rare instances, death.

The UKHSA has emphasised that vaccination remains the most effective method of preventing infection and containing outbreaks. The MMR jab, which guards against measles, mumps and rubella, is administered to children in two doses, though uptake has fallen in certain communities.

Officials have also pointed out that the figures remain provisional and are subject to change. Case numbers may be revised as additional testing takes place and some suspected cases are either confirmed or dismissed. The agency provides weekly updates on its measles surveillance data throughout April, before shifting to fortnightly reporting thereafter. The next update is expected on May 14.

Public health teams continue to keep a close eye on the situation, especially in regions experiencing the highest levels of transmission. While no deaths have been recorded so far this year, the extent and reach of infections highlight the danger of a disease many believed to be a thing of the past staging a significant resurgence.