The researchers discovered that 10.6% of exposed household contacts developed symptomatic illness within 14 days of exposure to asymptomatic test-positive children, a rate higher than expected.
Due to its rapid growth and potential to add to the respiratory virus burden in Northern Hemisphere countries, the World Health Organization (WHO) today designated JN.1, part of the BA.2.86 SARS-CoV-2 lineage, as its own variant of interest.
Over the past month, the proportion of JN.1 viruses has rapidly increased, rising from 3.3% in early November to 27.1% by early December. Countries reporting the highest proportions include France, the United States, Singapore, Canada, and the United Kingdom.
A study today of viral shedding dynamics in 101 children who had COVID-19 during the Omicron surge in Toronto shows that 40% were still infectious on the day after their symptoms resolved.
Why do some people have a more severe course of COVID-19 disease than others? A genome sequence database created by an international collaboration of researchers, including many from the University of Toronto and partner hospitals, may hold the answers to this question—and many more.
/cloudfront-us-east-2.images.arcpublishing.com/reuters/MUCU7WJPZBMQRJTTH3BLWNO2Y4.jpg)
