Rotavirus surge in Pretoria: Parents urged to spot dehydration signs quickly

Pretoria is seeing a sharp rise in rotavirus cases as the 2026 season takes hold, and health authorities are asking parents to learn the difference between a sick child and a child in danger. The National Institute for Communicable Diseases has flagged the uptick, prompting doctors to speak plainly about what dehydration looks like and how fast it can arrive.

Rotavirus is common in young children and spreads easily—through contaminated hands, surfaces, objects. Most children will encounter it. The virus typically announces itself with sudden vomiting followed by watery diarrhoea, sometimes accompanied by fever in roughly three to five out of every ten cases. A child may also lose appetite, grow sluggish, or complain of mild belly pain. For most families, this is manageable at home. For some, it becomes an emergency.

The danger is speed. Dr Angelique Coetzee, a South African general practitioner, emphasizes that a previously healthy baby can move from vomiting and loose stools to serious dehydration within twenty-four to forty-eight hours. Parents often assume they have time to watch and wait. They do not. This is why recognizing the early signs of fluid loss matters so much. A dry mouth, the absence of tears when a child cries, fewer wet nappies than usual, sunken eyes, unusual sleepiness, or a child who refuses to drink—these are the markers. More urgent still: a child who becomes very drowsy or floppy, develops cold or mottled skin, breathes rapidly, or cannot take fluids needs medical attention immediately.

Prof Nicola Page, who heads the Centre for Enteric Diseases at the NICD, notes that severe dehydration from rotavirus can be life-threatening. This is not hyperbole. It is why parents are told to give children with diarrhoeal symptoms oral rehydration solution—to replace lost fluids before the body tips into crisis. The focus should be on the child's overall state, not just counting episodes. A child who is still drinking, still passing urine, still engaging with the world is in a different category from one who has gone quiet, dry, and stopped urinating.

Vaccination offers real protection. The rotavirus vaccine is included in South Africa's immunisation programme and is recommended by the World Health Organisation. Coetzee stresses that parents should understand what the vaccine actually does: it does not necessarily prevent every case of diarrhoea, but it substantially reduces the chance that a young child will develop severe rotavirus gastroenteritis, become dangerously dehydrated, and end up in hospital. For parents worried about side effects, she points out that vaccines, like all medicines, carry a small risk—in this case, a rare condition called intussusception, where part of the intestine folds into itself. The benefits, she says, far outweigh this risk.

For parents hesitant about vaccination, Coetzee offers a clear direction: seek information from healthcare professionals, not social media. Decisions about childhood vaccination should rest on scientific evidence, not fear or misinformation. The message to parents is straightforward: stay alert, keep fluids going, know what severe dehydration looks like, and seek urgent help if a child shows those signs. Rotavirus is common. Severe dehydration is preventable. Speed matters.