Back-to-school after the Labor Day weekend could mean fresh spread of coronavirus unless schools take strong action to keep the virus in check, doctors and education experts are warning.

Anxiety is high among parents as more kids head back to school without the protection of a COVID-19 vaccine for at least a few more months.

The dramatic rise in COVID-19 cases and hospitalizations due to the more transmissible Delta variant is significantly impacting all age groups, particularly Americans ages 11 or younger who are not yet eligible to receive vaccinations.

Due to the surge of COVID-19 cases, the director of the US Centers for Disease Control and Prevention is asking unvaccinated Americans not to travel during the Labor Day holiday weekend.

As COVID-19 cases surge across the US, particularly among unvaccinated Americans, hospitals have been pushed to their limits treating the influx of patients -- and five states are nearly out of ICU beds.

Hospitals in parts of the South are running out of oxygen supply as COVID-19 cases and hospitalizations continue soaring, driven by the swaths of people who remain unvaccinated and a dangerous coronavirus variant that has infected millions of Americans.

The Philadelphia Housing Authority will require all employees to be vaccinated against the coronavirus by October 15.

The US Centers for Disease Control and Prevention sent a health advisory Thursday warning doctors and the public about the "rapid increase" in prescriptions for the anti-parasitic drug ivermectin.

Vaccine effectiveness against Covid-19 infection dropped from 91% to 66% once the Delta variant accounted for the majority of circulating virus, according to a study published Tuesday by the US Centers for Disease Control and Prevention.

Booster doses of Johnson & Johnson's one-shot coronavirus vaccine generated a big spike in antibodies, the frontline immune system defenses against infection, the company reported Wednesday.

As Americans face a daunting surge of COVID-19 hospitalizations -- with the rates for children and adults under 50 hitting their highest levels yet -- officials are hoping full approval of a vaccine could encourage more people to get vaccinated.

A vast majority of US residents live in an area with high COVID-19 transmission, but hospitalization and death rates are significantly higher in states with the lowest vaccination rates.

The pace of COVID-19 hospitalizations is surging across the US, with the rates for children and adults under 50 hitting their highest levels yet, according to data from the US Centers for Disease Control and Prevention.

NEW YORK  — U.S. health officials Wednesday announced plans to offer COVID-19 booster shots to all Americans to shore up their protection amid the surging delta variant and evidence that the vaccines' effectiveness is falling.

Pfizer and BioNTech said Monday they have submitted initial data to the US Food and Drug Administration to support the use of a booster dose of COVID-19 vaccine.

With the outlook of the COVID-19 pandemic growing worse as hospitalizations and cases surge among the unvaccinated, the surgeon general said many of those who have followed precautions may soon grow complacent due to fatigue.

WASHINGTON — Warning of tough days ahead with surging COVID-19 infections, the director of the National Institutes of Health said Sunday the U.S. could decide in the next couple weeks whether to offer coronavirus booster shots to more Americans this fall.