A child sits in a primary school classroom inside a gym in Borgosesia, Italy. Photo: Nicolò Campo/LightRocket via Getty Images

A hospital in the epicenter of Italy's coronavirus outbreak has seen a 30-fold increase of children with severe inflammatory symptoms most often associated with Kawasaki-like disease, according to a study published Wednesday in the medical journal The Lancet.

Why it matters: This is one of the first completed studies to examine the rise of an inflammatory illness that is affecting children — some of whom have tested positive for the coronavirus or its antibodies.

What they found: 7 boys and 3 girls, all aged 5 to 7 years old, were diagnosed with Kawasaki from February 18 to April 20. They were admitted to the hospital, on average, after six days of prolonged fever.

  • In the last five years, that hospital treated a total of 19 patients for those symptoms, the study finds.
  • Eight of the children who were admitted to the hospital since February tested positive for COVID-19 antibodies.

Symptoms for patients up to 21 years old, experiencing what doctors are calling "pediatric multisystem inflammatory syndrome," include:

    • Persistent fever and inflammation
    • Abnormal, sudden or rapid heart rhythm
    • Rash
    • Diarrhea and vomiting
    • Weak pulse and rapid breathing
    • Dizziness or loss of consciousness

The big picture: There have been at least 50 cases of the inflammatory symptoms throughout Europe, the New York Times reports, including in Switzerland, France, Britain and Spain. New York has reported 102 cases and three deaths as of Wednesday.

The bottom line: Doctors behind the study expect a "similar outbreak of Kawasaki-like disease" in countries experiencing coronavirus outbreaks.

Go deeper: Doctors face new urgency to solve children and coronavirus puzzle

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Data: The Center for Systems Science and Engineering at Johns Hopkins; Map: Axios Visuals

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By the numbers: Over 745,600 people have died of the novel coronavirus globally and over 20.4 million have tested positive, per Johns Hopkins. Almost 12.7 million have recovered from the virus.

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New Zealand reports first local coronavirus cases for 102 days

Prime Minister Jacinda Ardern after a press conference at Parliament on July 22 in Wellington, New Zealand. Photo: Hagen Hopkins/Getty Images

AUCKLAND, New Zealand — Auckland is locking down and the rest of New Zealand faces lesser restrictions for 72 hours after a four members of the same family tested positive for COVID-19, Prime Minister Jacinda Ardern announced Tuesday.

Why it matters: It's the first cases not in managed isolation for 102 days, Ardern said at a news briefing.

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Florida reports another daily record for coronavirus deaths

Nurse practitioner Barbara Corral and a research assistant conduct a COVID-19 vaccination study on August 7 in Hollywood, Florida. Photo: Joe Raedle/Getty Images

Florida's health department on Tuesday reported 276 new coronavirus deaths, surpassing the state's record from July 31.

The big picture: The state also recorded over 5,800 new cases — on the low side for a state that is one of the domestic epicenters for the virus.