Researchers from the Global Burden of Disease Study 2021 examined data from 204 countries to identify which germs cause dangerous diarrhea in children under five and where risks remain highest. The study tracked deaths and illness burden from 1990 to 2021, revealing both progress and persistent challenges.
This research matters for Singapore families because it shows how vaccination and sanitation protect our children—and why those protections cannot be taken for granted.
Diarrhea deaths have plummeted, but illness burden remains high
Global deaths from childhood diarrheal diseases fell from 2.43 million in 1990 to 560,000 in 2021—a genuine victory driven by rotavirus vaccines, clean water access, and oral rehydration therapy. However, the amount of time children spend sick or disabled from diarrhea only decreased by 77%, meaning many young children still suffer even when they survive.
Two pathogens (disease-causing germs) stand out: rotavirus and Shigella bacteria remain the biggest killers globally. Concerningly, Clostridioides difficile is the only diarrheal pathogen showing an increasing burden worldwide, suggesting emerging public health challenges ahead.
Huge gaps remain between rich and poor countries
The study reveals stark inequalities: diarrhea kills far more children per population in lower-income countries like Chad compared to wealthy nations like Andorra. This gap reflects unequal access to clean water, sanitation, healthcare, and vaccines—factors largely outside individual families' control.
For Singapore families, this serves as a reminder of our advantage. Your child's risk of dying from diarrhea is extremely low thanks to excellent water systems, vaccines, and medical care. However, rotavirus still circulates locally, and Shigella outbreaks occasionally occur in childcare settings.
Why Singapore families should stay alert
Even in a developed city-state, diarrhea prevention depends on ongoing effort. Good sanitation and food safety require continuous public health work, particularly in childcare centres where young children spend hours together. Families with relatives in lower-income countries or those travelling with young children to less developed regions should be especially mindful of vaccination and hygiene.
This study shows that while we've made remarkable progress, the work isn't finished—and complacency could reverse gains. The rotavirus vaccine, routinely available in Singapore from two months of age, remains one of the most effective protections against severe diarrhea.
Protect your child from diarrhea
- Ensure your child receives the rotavirus vaccine at 2, 3, and 4 months as scheduled, since it's the most effective defence against severe diarrhea.
- Practise handwashing and food hygiene, especially if travelling to areas with less reliable water systems or sanitation.
- If your child develops diarrhea, give oral rehydration salts (available from pharmacies) to prevent dangerous dehydration, and consult a doctor if symptoms worsen.