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Omicron infection linked with common respiratory illness in children: Study

  Infection with the Omicron variant of the SARS-CoV-2 virus is associated with a common respiratory illness in young children, known as croup, a previously unrecognised complication of COVID-19, according to a study.
The observational study, published recently in the journal Pediatrics, describes 75 children who came to the Boston Children’s Hospital emergency department (ED) with croup and COVID-19 from March 1, 2020, to January 15, 2022.
The researchers noted that some cases were surprisingly severe, requiring hospitalisation and more medication doses compared to croup caused by other viruses, adding that just over 80 per cent occurred during the Omicron period.
“There was a very clear delineation from when Omicron became the dominant variant to when we started seeing a rise in the number of croup patients,” said study first author Ryan Brewster, from Boston Children’s Hospital and Boston Medical Center.
Croup, also known as laryngotracheitis, is a common respiratory illness in babies and young children.
The illness is marked by a distinctive barking cough and sometimes noisy, high-pitched intakes of breath known as stridor.
It happens when colds and other viral infections cause inflammation and swelling around the voice box, windpipe, and bronchial tubes.
In severe cases, including some seen at Boston Children’s, croup can dangerously constrict breathing, the researchers said.
Previous studies of COVID-19 in animals have found that the Omicron variant has more of a “preference” for the upper airway than earlier variants, which mainly targeted the lower respiratory tract.