Delta variant accounts for 6% of new US coronavirus infections
A highly transmissible coronavirus variant first identified in India accounts for 6% of new infections in the United States, the Biden administration said Tuesday. Yet vaccines appear to be highly effective against this version of the virus that has quickly spread into Great Britain and elsewhere.
Anthony Fauci, the nation's leading infectious-disease expert, revealed the extent of the variant's push into the United States, but said it appears to be slowed by vaccines.
"It's essentially taking over" in the United Kingdom, Fauci said at a briefing for reporters. "We cannot let that happen in the United States, which is such a powerful argument" for vaccination, he said.
Fauci referred to data from Britain's public health agency that shows two doses of the vaccines made by Pfizer-BioNTech and AstraZeneca are 88% effective in preventing symptomatic disease caused by the new variant, also known as delta. He said in an interview that the Pfizer data would be similar for Moderna's product, which also is an mRNA vaccine.
But one vaccine dose offers just 33% protection, the data shows, a reminder of how strongly the second shot boosts immunity to the virus, Fauci said. With the United States in the midst of providing vaccines to adolescents and other people who have waited to get them, second doses are critical, he said.
Fauci, head of the National Institute of Allergy and Infectious Diseases, said virus transmission in Britain is "peaking" among 12- to 20-year-olds, one of the groups that the United States is rushing to vaccinate. In Britain, he said, the delta variant now accounts for more than 60% of new infections. Some British scientists are warning that the country faces a third wave of infection.
The numbers are based on genomic surveillance of cases in both countries.
At the same briefing, Rochelle Walensky, director of the Centers for Disease Control and Prevention, reported the continuing decline of coronavirus cases in the United States. She said "just over 10,000 new cases of COVID-19," the disease caused by the virus, were reported Monday, and the rolling seven-day average of cases totaled 13,277.
The latter number, considered more reliable, marked the first time the average has fallen below 15,000 since March 27, 2020, Walensky said. Daily hospitalizations have declined 83% from their peak on Jan. 9, she said, and the seven-day average of deaths from the disease is 379 per day.
"Each week there are more and more data to demonstrate the impact vaccination has on preventing disease and moving us out of this pandemic," Walensky said.
But with the daily vaccination average falling below 1 million recently, the administration continues to expand efforts to bring the vaccine to hard-to-reach groups, including people who need transportation to vaccine sites and workers who must take time off to be vaccinated. President Joe Biden has set a goal of vaccinating 70% of U.S. adults by July 4 — a goal that is in jeopardy. So far 13 states have reached that milestone.
Andy Slavitt, senior adviser to the task force, said the American Hospital Association will help employers find medical partners to open pop-up vaccine sites at workplaces during business hours, and Uber and Lyft will continue providing free transportation to vaccine centers through July 4.
Marcella Nunez-Smith, head of the coronavirus Health Equity Task Force, said pharmacies will be staying open late on Friday nights in June. More than half of doses administered at pharmacies in the past two weeks went to people of color, who trail Whites in receiving the vaccines, she said.