Contagion

New JN.1 COVID variant may be more contagious but less severe A new, fast-spreading variant named JN.1 now makes up 44% of all cases nationwide. Yahoo News

A new, fast-spreading variant named JN.1 now makes up 44% of all cases nationwide, more than doubling (21.3% vs. 44.2%) its share from the week before, according to the CDC COVID Data Tracker: Variant Proportions. ...

CDC director says U.S. isn't yet near peak Covid or flu levels for the season This winter's pattern is different from that of last year, when Covid, flu and RSV all peaked around the same time, Dr. Mandy Cohen told NBC News. NBC News

The U.S. is seeing a "sharp increase" in flu levels right now, particularly in the south, Cohen said Wednesday in an interview. Covid cases also appear to be climbing nationally, she said, while cases of respiratory syncytial virus, or RSV, seem to have reached their highest point this season.

WHO designates JN.1 as separate COVID-19 variant of interest PAHO/Flickr cc CIDRAP

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.