Malaria’s Hidden Toll: The Disease That Keeps Damaging Children’s Brains for a Decade

By the time a child recovers from cerebral malaria, the worst seems to be over. The seizures have stopped. The coma has lifted. The parasites are gone. Parents, exhausted with relief, take their child home from hospital. But something may have changed inside that small skull, quietly and permanently, in ways that won’t become fully visible for years.

A study published this week in JAMA followed 889 Ugandan children for up to 15 years after they had survived severe malaria as toddlers, and found that those who had experienced the two most dangerous forms of the disease, cerebral malaria and severe malarial anemia, still showed measurable cognitive deficits in later childhood and adolescence. Persistent reductions in overall thinking ability and mathematical achievement, detectable long after anyone would have expected the brain to have healed.

The magnitude is not catastrophic in individual terms, roughly 3 to 7 IQ points lower on average. But apply that across the more than 1 million children who develop cerebral malaria or severe malarial anemia every year, almost entirely in sub-Saharan Africa, and the numbers start to feel genuinely vast. A continent of children quietly carrying a cognitive burden that standard medicine doesn’t track, because once you survive malaria, the story is considered over.

A Decade Later, the Gap Remains

The research, led by Paul Bangirana at Makerere University and Chandy John at Indiana University, grew out of two earlier Ugandan cohort studies that recruited children during acute severe malaria episodes between 2008 and 2018. Researchers tracked these children through hospitalization, followed up for one to two years, then between 2020 and 2023 traced back nearly 77 percent of surviving participants and enrolled them in a dedicated long-term follow-up called the MIND study, for Malarial Impact on Neurobehavioral Development.

What they found, after controlling for age, sex, socioeconomic background, caregiver education, nutrition markers and subsequent malaria episodes, was a clear and persistent gap. Children who had survived cerebral malaria (which causes coma through inflammation and impaired blood flow to the brain) scored about 0.41 standard deviations lower on a composite measure of cognitive ability than unaffected children from the same neighborhoods. Children who had survived severe malarial anemia, in which the parasite destroys red blood cells to the point where oxygen delivery to the brain is dangerously compromised, showed a similar but slightly smaller deficit of 0.31 standard deviations.

In math achievement, the picture was comparably bleak: 0.46 standard deviations lower for cerebral malaria survivors, 0.32 lower for severe anemia survivors. Reading scores were not significantly different. Neither were attention scores. The damage appears specific rather than global, concentrated in domains that depend on abstract reasoning and sequential processing.

There’s a small irony in that finding. An earlier analysis of the same cohort found lower reading scores but not math scores about five years after illness. Now, at nearly a decade out, it’s the other way around. The researchers flag this honestly, noting the discrepancy is unexplained, though they point to research on children ten years after traumatic brain injury that similarly found arithmetic to be the most persistently impaired skill.

What Makes the Damage Worse

The study tried to understand who, among children with severe malaria, ends up with the worst long-term outcomes. Three biological features at the time of the original illness emerged as predictors of worse cognitive scores nearly a decade later. The first was acute kidney injury, present in about 125 of the children studied, which was associated with lower cognition, lower reading achievement and lower math achievement at follow-up. The second was hyperuricemia (elevated uric acid in the blood, seen in 77 children), which predicted worse overall cognitive scores. The third was elevation in a protein called angiopoietin-2, a marker of damage to the cells lining blood vessels, which also predicted worse cognitive outcomes.

On the surface these might seem like peripheral complications, kidney problems and blood chemistry disruptions rather than direct brain damage. But that’s precisely what makes them interesting. They suggest the cognitive harm doesn’t come only from what cerebral malaria does directly to neurons, but also from a cascade of systemic failures that each carry their own neurological price. Children with cerebral malaria who still had neurological deficits at hospital discharge, things like abnormal gait, speech problems or weakness, fared worst of all. And elevated plasma tau protein, a marker of neuronal injury familiar from research into Alzheimer’s disease, measured at the time of acute illness, also predicted worse cognitive and math scores years later.

Not All Severe Malaria Is Equal

One of the more striking findings was what didn’t show up in the data. Children who had experienced other severe forms of malaria, including respiratory distress, complicated seizures without coma, and a form of extreme weakness called prostration, showed no significant cognitive or academic deficits compared with community children at follow-up. The critical factor appears to be whether the illness directly compromised oxygen delivery or blood flow to the developing brain. Severe seizures without coma, for instance, are alarming in the moment but don’t seem to carry the same long-term cognitive cost.

That specificity is actually useful. It means clinicians can identify, right there in the acute care setting, which children are at highest risk for lasting cognitive harm: those in coma, those with extreme anemia, those with kidney injury or high angiopoietin-2. Those are the children who need follow-up not just for physical recovery, but for educational support years down the line. Uganda has since made post-discharge malaria chemoprevention standard practice for survivors of severe malaria; whether preventing reinfection also helps protect cognitive development remains an open question, and an urgent one.

Somewhere in Kampala or Jinja right now, children who spent a few days in a coma at age two or three are sitting at school desks, working through arithmetic problems that feel slightly harder than they should. They don’t know why. Their teachers don’t know why. And until recently, neither did science.

Source: Bangirana et al., “Long-Term Cognitive Ability and Academic Achievement After Childhood Severe Malaria,” JAMA, April 18, 2026. https://doi.org/10.1001/jama.2026.0704

Frequently Asked Questions

If a child seems to fully recover from malaria, can their brain still be affected long-term?

Yes, and that’s the unsettling finding at the heart of this research. Children who survived cerebral malaria or severe malarial anemia and appeared to recover still showed measurable reductions in cognitive ability and math achievement up to 15 years later, compared with unaffected children from the same communities. The damage is subtle enough that neither parents nor teachers would necessarily connect it to an illness from early childhood.

Why does cerebral malaria specifically affect math more than reading?

Researchers don’t yet have a definitive answer, but the pattern is consistent with what’s been seen after other early brain injuries. A study of children 10 years after traumatic brain injury found arithmetic to be the most persistently impaired skill, suggesting that mathematical reasoning may be especially sensitive to disruptions in the developing brain’s sequential processing systems. Interestingly, an earlier analysis of the same cohort found reading, not math, was affected at the five-year mark, so the picture may continue to shift as children age.

How can doctors tell at the time of illness which children are most at risk for lasting brain damage?

The study identified three biological markers measurable during the acute episode that predicted worse cognitive outcomes years later: acute kidney injury, elevated uric acid in the blood (hyperuricemia), and high levels of a protein called angiopoietin-2, which signals damage to blood vessel walls. Neurological deficits still present at hospital discharge were also a strong warning sign. None of these are exotic tests, which raises the possibility of identifying high-risk children early and targeting them for longer-term educational support.

Is this a problem only for the most severe malaria cases, or could milder infections also affect the brain?

The study found significant long-term cognitive effects only in children who had experienced cerebral malaria or severe malarial anemia, not in children with other serious forms of the disease including complicated seizures, respiratory distress, or extreme weakness. Uncomplicated malaria was not studied here, but the findings suggest the brain damage is driven specifically by coma or catastrophic loss of red blood cells rather than by the malaria parasite itself in milder infections.

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