A virus like this one has a lot of different names because it is changing constantly, and scientists need a common language to talk about a specific version that they’re seeing in a particular community or that they’re working with to develop treatments, vaccines and tests.
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.
The fact that JN.1 is responsible for a growing portion of infections suggests it is either more contagious or better at getting past our bodies’ immune defenses than previous iterations of the virus, the CDC says. But there is no evidence that it causes more severe disease. The World Health Organization (WHO) has not labeled JN.1 a variant of concern—that is, a new strain of the SARS-CoV-2 virus with potential for increased severity; decreased vaccine effectiveness; or substantial impacts on health care delivery.
Hospital-acquired (nosocomial) COVID-19 transmission was associated with higher rates of 30-day mortality and more severe disease during the early phases of the pandemic, but the risk has lessened in the post-Omicron landscape, according to a new study from JAMA Network Open based on outcomes seen in Sweden during the past 3 years.
As the United States enters respiratory virus season and health officials roll out updated COVID-19 vaccines, a new COVID variant HV.1 has emerged and is currently sweeping the country.
A new investigation led by researchers from the University College London and Dartmouth College suggests 14% of Americans had long COVID by the end of 2022. The details of the investigation are published in PLOS One.
Moreover, Americans who report having experienced long COVID said they also experienced more anxiety, low mood, and difficulty with memory. ...
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