FORT LAUDERDALE, Florida (AP) — The COVID-19 outbreak in the United States crossed 100,000 new confirmed daily infections yesterday, a milestone last exceeded during the winter surge and driven by the highly transmissible Delta variant and low vaccination rates in the south.

Health officials fear that cases, hospitalisations and deaths will continue to soar if more Americans don’t embrace the vaccine. Nationwide, 50 per cent of residents are fully vaccinated and more than 70 per cent of adults have received at least one dose.

“Our models show that if we don’t [vaccinate people], we could be up to several hundred thousand cases a day, similar to our surge in early January,” Centers for Disease Control and Prevention (CDC) Director Rochelle Walensky said on CNN last week.

It took the US about nine months to cross 100,000 average daily cases in November before peaking at about 250,000 in early January. Cases bottomed out in June, averaging about 11,000 per day, but six weeks later the number is 107,143.

Hospitalisations and deaths are also increasing, though all are still below peaks seen early this year before vaccines became widely available. More than 44,000 Americans are currently hospitalised with COVID-19, according to the CDC, up 30 per cent in a week and nearly four times the number in June. More than 120,000 were hospitalised in January.

The seven-day average for deaths rose from about 270 deaths per day two weeks ago to nearly 500 a day as of Friday, according to Johns Hopkins University. Deaths peaked at 3,500 per day in January. Deaths usually lag behind hospitalisations as the disease normally takes a few weeks to kill.

The situation is particularly dire in the south, which has some of the lowest vaccination rates in the US and has seen smaller hospitals overrun with patients.

In the south-east, the number of hospitalised COVID-19 patients jumped 50 per cent to a daily average of 17,600 over the last week from 11,600 the previous week, the CDC says. Florida, Georgia, Alabama, Mississippi, North Carolina, South Carolina, Tennessee and Kentucky represent 41 per cent of the nation’s new hospitalisations, the CDC says, twice their overall share of the population.

Alabama and Mississippi have the lowest vaccination rates in the country: less than 35 per cent of residents are fully inoculated, according to the Mayo Clinic. Georgia, Tennessee and the Carolinas are all in the lowest 15 states.

Alabama saw more than 65,000 doses wasted because health providers couldn’t find people to take them before they expired, according to State Health Officer Scott Harris. That represents less than 1.5 per cent of the more than five million coronavirus vaccines doses that Alabama has received.

“Sixty-five thousand doses have been wasted. That’s extremely unfortunate when we have such a low vaccination rate and of course, there are so many people in the world that still don’t have access to vaccine,” Harris said.

Florida has been especially hard hit. It makes up more than 20 per cent of the nation’s new cases and hospitalisations, triple its share of the population. Many rural counties have vaccination rates below 40 per cent, with the state at 49 per cent. The state again set a record yesterday, reporting 23,903 new cases.

Governor Ron DeSantis, while encouraging vaccinations, has taken a hard line against mask rules and other restrictions. Running for re-election next year and eyeing a 2024 Republican presidential bid, he and President Joe Biden have verbally sparred in recent days. DeSantis has accused the Democratic president of overreach, while Biden has said DeSantis should “get out of the way” of local officials if he doesn’t want to fight the outbreak.

Some people have been scared off from the vaccine by bogus warnings on social media and from some non-medical media personalities.

Miami-area real estate agent Yoiris Duran, 56, said her family was swayed by the misinformation, although doctors and public health officials have almost universally encouraged people to get vaccinated. After she, her husband and 25-year-old son got seriously ill with COVID-19 and were hospitalised, she’s now encouraging friends and family to get vaccinated.

“I don’t want people to go through what we have gone through,” she said in a video interview with Baptist Health Systems.

In some parts of the US, hospitals are scrambling to find beds for patients.

Dr Leonardo Alonso, who works in several emergency rooms in Jacksonville, one of Florida’s hardest-hit areas, said some hospitals are sending some COVID-19 patients home with oxygen and a monitor to free beds for sicker people.

“The ICUs, the hospitals are all on a near what we call mass casualty incident. They’re almost at protocols where they’re overflowing,” Alonso said.

In Texas, Houston, officials said some patients were transferred out of the city — one as far as North Dakota.

Dr David Persse, Houston’s chief medical officer, said some ambulances were waiting hours to offload patients because no beds were available. Persse said he feared this would lead to prolonged response times to 911 medical calls.

“The health-care system right now is nearly at a breaking point. … For the next three weeks or so I see no relief on what’s happening in emergency departments,” Persse said Thursday.