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JN.1 designated by WHO as separate COVID-19 variant of interest

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.

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40% of children still infectious after symptoms are resolved --study

 

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.

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Paxlovid cuts hospitalization, death only in COVID patients with weak immune systems -- Canadian study

 

...in JAMA Network Open, an observational Canadian study ties the antiviral drug combo nirmatrelvir-ritonavir (Paxlovid) to a lower risk of hospitalization or death only in very high-risk COVID-19 patients with weakened immune systems.

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