Every part of the West Midlands region saw a significant increase in Covid-19 cases over the Christmas period, according to the latest figures.
Cannock Chase, Nuneaton and Bedworth, South Staffordshire and Wolverhampton all saw their rates at least double in the seven days up to 1 January.
Hospital admissions also rose.
Across the Midlands region as a whole, the number of patients with Covid-19 climbed just over 60% in the week up to 5 January. However, they have not yet reached the peak seen a year ago.Copyright: PA Media
Cannock Chase, the worst affected area in the West Midlands, saw its rate rise to 2,200 new infections per 100,000 people. But among those aged 20 to 24, it was almost double that.
The number of weekly cases in the area has increased from 470 at the beginning of December to 2,233.
In Shropshire and Telford & Wrekin, the rate of those testing positive climbed by 98% and 92% respectively, week-on-week. While schools were on holiday, cases were again most common in 20 to 35-year-olds.
Birmingham, the largest local authority in England, saw a 50% increase in its rate - up from 945 new infections per 100,000 people to 1,415.
The city has seen more total cases (233,617) and more deaths (3,134) than any other council area in England.
Early figures released by the Office for National Statistics on Wednesday suggested one in 15 people in England had the virus at the end of 2021.
By John Bray
BBC News, West Midlands