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September 9, 2024
July 27, 2022
Scientists in the U.K. say they have identified the likely cause of a recent outbreak of mysterious liver disease afflicting young children around the world. New research suggests that a lack of exposure to two common viruses during the Covid-19 pandemic may have increased the chances of children becoming severely ill with acute hepatitis.
Crucially, both teams said they found no evidence of a direct link between the spike in hepatitis cases and coronavirus infection, the cause of Covid-19.
Coinfection of viruses more than 1,000 children in 35 countries have developed an unidentified type of severe acute hepatitis — or liver inflammation — since the first case was reported in January.
Adenovirus, which typically causes mild cold or flu-like illness, was previously believed to be partly responsible for the mysterious outbreak, as it was the most commonly found virus in samples from affected children.
“While we still have some unanswered questions about exactly what led to this spike in acute hepatitis, we hope these results can reassure parents concerned about Covid-19 as neither teams have found any direct link with SARS-CoV-2 infection,” professor Judith Breuer, UCL GOS Institute of Child Health, said in the report.
The findings add to theories among some health experts that Covid lockdowns have reduced public immunity to a number of common illnesses. The researchers added there was no link to coronavirus vaccines.
The two studies were conducted independently and simultaneously using U.K. samples. Dr. Sofia Morfopoulou, professor at UCL’s GOS Institute of Child Health, said further research was now needed to compare their findings with cases of acute hepatitis identified in other countries.
“International collaborations to further investigate and elucidate the role of AAV2 and co-infecting viruses in pediatric unexplained hepatitis in patients from different countries are now needed,” she said.