CDC researchers report several Philippine children developing the incurable neurological disease just a few years after measles infection, raising concerns about a wider post-outbreak wave.
A rare and usually fatal measles complication has appeared in several Philippine children only a few years after they were infected, according to research published by CDC scientists in Emerging Infectious Diseases. The illness, subacute sclerosing panencephalitis, or SSPE, slowly destroys the brain and nervous system and has no cure. The findings are especially unsettling because the condition is typically associated with a much longer delay after measles infection.
The study reviewed 20 children treated for SSPE at a paediatric hospital in Quezon City between 2007 and 2022. Four children whose earlier infections matched the country’s 2018-2019 measles outbreak were admitted from 2020 to 2022, which the authors said most likely marked the beginning of a larger post-outbreak wave. The median age at hospital admission was 6.2 years, and the median age when measles was first caught was just 0.7 years, meaning many were infected before they were old enough to receive routine vaccination.
The report also underscores how measles outbreaks can create harm that is not immediately visible. According to the CDC, SSPE usually develops seven to 10 years after infection, often after a child seems to have recovered fully. But the Philippine cases linked to the outbreak appeared much sooner. Earlier U.S. data suggest the risk is greatest when measles occurs very young: a JAMA analysis of the SSPE Registry found that half of U.S. cases between 1960 and 1970 followed measles infection before age 2.
The study does not prove that the same pattern will unfold in the United States, but it does serve as a warning. The CDC has said SSPE is rarely reported in the US, yet more measles infections increase the chance of future cases, especially among children infected as infants. A federal report on a teenage boy who died in Oregon from SSPE illustrated that danger: he had contracted measles in the Philippines at age 1 and later developed the brain disease. The Philippine study authors called for better SSPE surveillance and continued high vaccination coverage, noting that more cases could still emerge over time.
For families, the practical lesson is straightforward. The best protection remains two doses of the MMR vaccine, with the first dose given on the routine schedule in early childhood. Infants aged 6 to 11 months may need an early dose before international travel, and health officials may recommend one during outbreaks. Parents should also pay attention to gradual warning signs of SSPE, including worsening school performance, changes in behaviour or personality, clumsiness and muscle jerks, followed later by seizures. Any child with a history of measles who begins to lose skills should be assessed by a paediatric neurologist, even if the infection happened years earlier.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
