COVID-19 vaccine effectiveness has plummeted for both pregnant women and newborns since Omicron became the dominant virus strain in the United States, according to data presented by U.S. Centers for Disease Control and Prevention (CDC) officials on Oct. 19.
The effectiveness of two doses of a Pfizer or Moderna shot against emergency department and urgent care visits was 87 percent after two doses and remained high at 78 percent after 150 or more days while the Delta variant was predominant, according to data from the CDC-funded VISION network.
But two doses started at just 39 percent effectiveness against Omicron and dropped to 11 percent after 150 or more days, according to the data, which was presented to the CDC’s vaccine advisory panel….