The omicron subvariant XBB.1.5 is gaining dominance in the U.S., though its prevalence still varies greatly by region.
The subvariant accounted for 27.6 percent of U.S. COVID-19 cases in the week ending Jan. 7, up from 18.3 percent the week prior, CDC estimates show.
The Northeast has the highest proportion of cases from XBB.1.5 — sitting at more than 70 percent — while states in the Midwest have the lowest at about 5 percent.
Below is a breakdown of the subvariant's prevalence in each HHS surveillance region as of Jan. 6:
|
HHS surveillance region |
Prevalence of XBB.1.5 |
|
Region 1 Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont |
71.6 percent of all COVID-19 cases |
|
Region 2 New Jersey, New York, Puerto Rico and the Virgin Islands |
72.7 |
|
Region 3 Delaware, District of Columbia, Maryland, Pennsylvania, Virginia and West Virginia |
32.1 |
|
Region 4 Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina and Tennessee |
17.3 |
|
Region 5 Illinois, Indiana, Michigan, Minnesota, Ohio and Wisconsin |
7.3 |
|
Region 6 Arkansas, Louisiana, New Mexico, Oklahoma and Texas |
16.6 |
|
Region 7 Iowa, Kansas, Missouri and Nebraska |
5.6 |
|
Region 8 Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming |
6.6 |
|
Region 9 Arizona, California, Hawaii, Nevada, American Samoa, Commonwealth of the Northern Mariana Islands, Federated States of Micronesia, Guam, Marshall Islands and Republic of Palau |
7.6 |
|
Region 10 Alaska, Idaho, Oregon and Washington |
6.7 |
For more information on XBB.1.5's transmissibility and severity, click here.