Global health experts are looking into reports of a rare but serious syndrome affecting children.
The World Health Organisation (WHO) said it had asked its global networks of clinicians to be on “alert” for the rare phenomenon, which was first noticed by medics in the UK.
Fewer than 20 children in England have been admitted to hospital with the syndrome, which causes a toxic shock-style inflammatory reaction.
The illness may be caused by the novel coronavirus but experts are not sure because some of the affected children have not tested positive for Covid-19.
There are some recent rare descriptions of children in some European countries that have had this inflammatory syndrome, which is similar to the Kawasaki syndrome
It follows an alert shared with NHS trusts and GP groups by NHS England asking medics to remain on high alert for signs of the disease.
The condition is said to be similar to Kawasaki disease, which mainly affects children under the age of five, with symptoms including a high temperature for five days or more, rashes and swollen glands in the neck.
Dr Maria Van Kerkhove, WHO technical lead for Covid-19, said: “We are aware of this report, which came out of the United Kingdom, about a small number of cases amongst children with this inflammatory response.
“We’re looking at this with our clinical network.
“There are some recent rare descriptions of children in some European countries that have had this inflammatory syndrome, which is similar to the Kawasaki syndrome.
“What we’ve asked for is for the global network of clinicians to be on alert for this, and to ensure that they capture information on children systematically so that we could better understand what is occurring in children, and so that we could better improve our understanding and guide treatment.
“But it seems to be very rare and only in maybe one or two countries so far and additional countries that have not recorded this yet, but this is something that the clinical network is looking into specifically.”
WHO officials stressed that the vast majority of children who get Covid-19 will have a mild infection and “recover completely”.
It’s really important that paediatricians and clinicians get time to collect information and share that
Dr Mike Ryan, executive director of the WHO health emergencies programme, told a press briefing in Geneva: “The Sars-Cov-2 virus causing Covid-19 obviously is causing inflammation and attacks tissue, other than lung tissue.
“We are in a situation where clinicians are looking at what those other effects of having this coronavirus infection are.
“And we’ve seen this in the past with many emerging diseases, they don’t necessarily only attack one type of tissue, there can be multiple organs affected and many of you have seen the reports of other organs that have been affected with this disease.
“So it’s really important that this information is shared around the world.
“It’s really important that paediatricians and clinicians get time to collect information and share that.
“But again, just to reassure parents out there – this is a rare complication.
“And one should always be watchful of the children who are experiencing infectious disease or any deterioration of the condition, but I think it’s important that parents out there are reassured.”