Parents are warned to watch for the symptoms of a new syndrome, causing some children to become seriously ill.
The condition, similar to Kawasaki disease, has made some children seriously ill in the hospital and has been linked to fatalities.
Experts believe it may be related to coronavirus – with symptoms that appear in children who have the disease without knowing it.
Professor Russell Viner, president of the Royal College of Paediatrics and Child Health, said there have been “75 to 100” cases across the country.
A 14-year-old boy with no underlying health issues being treated at Evelina London Children’s Hospital is said to be the first British child to die of the syndrome.
Prof Viner told BBC Today’s Today program that it appears to happen after a child is infected with Covid-19 and that the body’s “immune system overreacts to coronavirus.”
He said that while parents should be aware of the disease, they shouldn’t be concerned.
“We can count the number of children who died with coronavirus on the fingers of two hands, compared to more than 30,000 in adults. And that tells us most of what we need to know, “he said.
“This is a new syndrome. It seems to happen mainly after a coronavirus infection, we think that the body’s immune system overreacts to coronavirus. “
According to Prof Viner, the main symptoms of the condition are high and persistent fever and rash, while some children also experience abdominal pain and gastrointestinal problems.
He said that while some patients need intensive care, others have responded to the treatment and are getting better and going home.
The disease is said to be similar to Kawasaki disease, which mainly affects children under the age of five, with symptoms such as high temperature, rash, swelling, and a toxic shock reaction.
Prof Viner emphasized that cases seem to “disappear” as the number of Covid-19 infections in adults decreases.
“Things seem to be disappearing now. When we pass the peak, the coronavirus in children disappears, just like in adults, ‘he told the BBC.
“This happens after the coronavirus, so it may seem to have peaked two to four weeks after the coronavirus peak.
The disease was first reported in the UK and New York Governor Andrew Cuomo has revealed that the disease has affected children in at least 15 states in the United States and in five European countries.
He called a change in skin color and a beating heart just two of a “wide range of symptoms,” adding, “Parents should be aware of this.
“As a parent, I can tell you this is every parent’s worst nightmare. It’s really disturbing.”
Kawasaki disease is a condition that primarily affects children under 5 years of age and is also known as mucocutaneous lymph node syndrome.
According to the NHS, the disease has seven main symptoms that parents should be aware of:
- Fever for more than 5 days
- Swollen glands in the neck
- Dry, chapped lips
- Red fingers or toes
- Red eyes
If you notice these symptoms in your child, it is important to seek medical attention as soon as possible.
The NHS advises: “It is best if treatment starts as soon as possible. The earlier the treatment starts, the faster the recovery time and the smaller the chance of complications.
“Intravenous immunoglobulin (IVIG), a solution of antibodies and aspirin, are the 2 main drugs used to treat Kawasaki disease.”
Doctors have now reported cases of the mysterious illness in the UK, US, France, Italy, Spain, and Switzerland.
The first reports were in the UK where it is believed that there are at least 12 cases.
Meanwhile, French Health Minister Olivier Veran revealed earlier this month that the disease has been observed in “about 15 children of all ages.”
In a conversation with Franceinfo, Mr Veran also confirmed that cases have been reported in Spain, Italy and Switzerland, with fever, indigestion and vascular inflammation being the main symptoms.