US coronavirus: Delta variant is ‘Covid-19 on steroids,’ expert says, with cases increasing in nearly half of US states
For fully vaccinated people, the variant “presents very little threat to you, very unlikely that you’re gonna get sick,” he said
Full approval for vaccines from the US Food and Drug Administration could encourage more people to get vaccinated, Slavitt and other experts have said. The current vaccines distributed in the US are authorized for emergency use only. Full approval for the Pfizer vaccine could come as early as this month, Slavitt said Tuesday.
Cases and hospitalizations are up especially in parts of the country where vaccination coverage is low, CDC Director Dr. Rochelle Walensky said at a White House Covid-19 briefing Thursday.
Counties with the highest case rates tended to have low vaccination rates. In the last week, 173 counties had at least 100 cases per 100,000 residents — and in more than 90% of those counties, vaccination coverage was less than 40%, Walensky said.
More than 9 million people live in those counties, she said.
“Many of these counties are also the same locations where the Delta variant represents the large majority of circulating virus,” Walensky said.
“Low vaccination rates in these counties, coupled with high case rates — and lax mitigation policies that do not protect those who are unvaccinated from disease — will certainly, and sadly, lead to more unnecessary suffering, hospitalizations and potentially deaths,” she added.
The case rate has been rising for the US as a whole. The country averaged more than 15,060 new cases a day over a week ending Wednesday — 20.7% higher than the average from the week prior, according to Johns Hopkins data.
The average is still well below this spring’s peak — an average of 71,320 daily for a week ending April 14 — and the pandemic peak average of more than 251,000 daily for a week ending January 8.
Covid-19 hospitalizations also have been ticking up recently. The number of Covid-19 patients in US hospitals was nearly 18,000 Tuesday, according to the US Department of Health and Human Services.
That’s slightly above the total of 16,792 two weeks earlier, though well below the pandemic peak of more than 136,000 on January 5.
5 largest undervaccinated clusters largely in the South
The analysis by researchers at Georgetown University identified 30 clusters of counties with low vaccination rates and significant population sizes. The five most significant of those clusters are sprawled across large swaths of the southeastern United States and a smaller portion in the Midwest.
The five clusters are largely in parts of eight states, starting in the east in Georgia and stretching west to Texas and north to southern Missouri. The clusters include parts of Alabama, Arkansas, Louisiana, Oklahoma and Tennessee, and are made up of mostly smaller counties but also cities such as Montgomery, Alabama; Shreveport, Louisiana; and Amarillo, Texas.
Most of these states are currently seeing increases in Covid-19 cases.
“Parts of the country are just as vulnerable if not more vulnerable than they were in December 2020,” said Shweta Bansal, an associate professor of biology at Georgetown University. Bansal heads up the US COVID-19 Vaccination Tracking project, which has been gathering data on the US vaccine rollout since it began in December.
Vaccinations saved hundreds of thousands of lives in US, researchers say
Three countries account for more than a third of all global deaths. The US, which has the highest number of fatalities at 606,000, accounts for 15% of the global total, followed by Brazil and India.
Underscoring vaccines’ effectiveness, researchers say the American toll would have been a lot worse without inoculations.
Fears about more variants if people don’t get vaccinated
The Delta variant is not the only one worrying health experts.
“Right now, you want to look at who’s getting sick, whether from the Delta variant or any other variant: It’s people who haven’t been vaccinated,” Dr. Megan Ranney told CNN on Wednesday.
“I don’t want it to come to this, but I am hopeful that these surges will drive more people in those states with low vaccination rates to finally go out and get their shot.”
But she offered an unsettling insight on the current surge of cases.
“What worries me more are the variants yet to come. And every time this virus is passed from one person to another, it has a chance to mutate. And it’s only a matter of time until we have a variant against which the vaccines no longer protect us,” she explained.
Current federal guidelines say fully vaccinated people can refrain from routine testing. Studies and experts have also said the vaccines are still highly protective.
“I think now we should revisit this policy with the Delta variant and determine if the current recommendations hold up,” Dr. Peter Hotez, dean of the National School of Tropical Medicine at Baylor College of Medicine, wrote in an email to CNN on Wednesday.
The CDC is only reporting data on “breakthrough” infections that cause severe disease. That could mean scientists and health officials will not know how many vaccinated people have mild or asymptomatic infections — and it will be very difficult to track whether a new variant such as Delta is causing more vaccine failure.
CNN’s Deidre McPhillips, Jason Hanna, Jacqueline Howard, Keri Enriquez, Virginia Langmaid, Elizabeth Cohen, John Bonifield and Hannah Sarisohn contributed to this report.