KEY POINTS
  • The U.S. seven-day average of daily new coronavirus cases is up by at least 5% in 27 states, according to data compiled by Johns Hopkins University.
  • The pace of vaccinations continues to pick up, with the country giving out about 2.5 million shots per day.
  • But the lifting of restrictions in many states and the spread of more contagious variants in the U.S. threaten to undo the nation's progress.
Paramedics arrive with a patient with Covid-19 at the emergency department of Sharp Memorial Hospital in San Diego, California.

New cases of Covid-19 are once again on the rise across more than half of the United States as officials race to vaccinate additional people before highly contagious variants become prevalent in the country.

As of Sunday, the seven-day average of new cases rose by 5% or more in 27 states, according to a CNBC analysis of data compiled by Johns Hopkins University. Across the U.S., the nation logged an average of 54,308 new cases per day over the past week — a 1% rise from the prior week after months of rapidly declining case numbers, according to the data.