Covid cases are on the rise again in the US, fueled by a new variant known as JN.1. Since many people now test at home, health officials are using wastewater to get measures of its prevalence.
The variant is linked to about 60% of new cases, according to CDC data. A member of the omicron family, JN.1 is descended from the BA.2.86 variant. Its most notable new mutation changes the spike protein that latches onto cells, enhancing its ability to evade our immunity. But even if JN.1 is more skilled at dodging antibodies from previous infections and vaccinations, it is not entirely resistant to them.
A recent study of disease spread found that length of exposure was the biggest factor in transmission. A team led by University of Oxford researchers found that 82% of cases were acquired from exposures that lasted longer than one hour.
Despite COVID’s omnipresence, the chance of hospitalization and death is unmistakably lower than in previous years. The number of people in California hospitals with COVID grew to about 2,000 by the end of December, half of last winter’s peak, and just a tenth of the record high.
But the nebulous threat of developing what is known as long COVID remains, and millions across the United States have already experienced it.