KEY POINTS
  • The decline in Covid-19 cases reported in the U.S. since early January may be flattening, the head of the CDC said Friday.
  • The recent shift may be a sign that new, highly transmissible variants of the coronavirus are beginning to take hold, Director Dr. Rochelle Walensky said.
  • Walensky said states shouldn't begin to lift restrictions on businesses and gatherings given the recent leveling-off in cases.
Dr. Rochelle Walensky, who has been selected to serve as director of the Centers for Disease Control and Prevention speaks during an event at The Queen theater in Wilmington, Del., Tuesday, Dec. 8, 2020.

The decline in Covid-19 cases reported in the U.S. since early January may be flattening, a concerning shift as highly transmissible variants threaten to exacerbate infections, the head of the U.S. Centers for Disease Control and Prevention said Friday.

"Over the last few weeks, cases and hospital admissions in the United States have been coming down since early January, and deaths have been declining in the past week," CDC Director Dr. Rochelle Walensky said during a press briefing. "But the latest data suggest that these declines may be stalling, potentially leveling off at still a very high number."