Researchers conducted the study when the delta variant was the dominant strain and found that mask requirements resulted in 72-percent fewer cases.
A recent CDC report found that those who were vaccinated and survived a COVID-19 infection were more protected from delta than those who were vaccinated but did not previously contract the virus
The differences between omicron and delta variant symptoms were analyzed as part of a COVD-19 infection survey.
UCLA was scheduled to face North Carolina State in Tuesday's 43rd annual Holiday Bowl. Tuesday afternoon the university announced it would be unable to participate.
In the two weeks since omicron first was reported in Southern Africa, other doctors have shared similar stories. All caution that it will take many more weeks to collect enough data to be sure, their observations and the early evidence offer some clues.
Viruses mutate constantly. To find and track new versions of the coronavirus, scientists analyze the genetic makeup of a portion of samples that test positive.
The contagious delta variant is driving up COVID-19 hospitalizations in the Mountain West and fueling disruptive outbreaks in the North.
Dr. Rochelle Walensky, director of the CDC, said Wednesday the AY4.2 sublineage recently identified in the United Kingdom has also been observed in the United States.
The COVID-19 risk among children has increased amid the delta variant and the start of the school year, a pediatricians group said.
R.1 is not a CDC variant of concern or interest
The delta variant has been identified in at least 180 countries, according to the World Health Organization.
Idaho's public health leaders have expanded health care rationing statewide amid a massive increase in the number of coronavirus patients requiring hospitalization.
Health officials say the state of Florida has surpassed 50,000 coronavirus deaths since the pandemic began. The U.S. Centers for Disease Control and Prevention has tallied 50,811 deaths after adding more than 1,500 COVID-19 deaths provided by state authorities on Thursday.
U.S. unemployment claims rose last week to 332,000 from a pandemic low, a sign that worsening COVID-19 infections may have slightly increased layoffs.
The share of COVID-19 tests in El Paso that come back positive is hovering around 6%, while the statewide positivity rate is three times that at 18%.
The leading U.S. airlines say that the rise in COVID-19 cases is hurting ticket sales and pushing back the recovery of the travel industry.
The U.S. COVID-19 death toll reached 650,000 this week as the nation faces the delta variant fueling hospitalizations, many of whom are unvaccinated.
A new report from the American Academy of Pediatrics says more one in four coronavirus cases are among children — the highest ratio since the pandemic began.
Oxford University said the U.S. has seen nearly four times as many COVID-19 cases compared to Labor Day 2020. Deaths were also nearly twice as high compared to a year ago, according to the same chart.
Mayor Steve Adler addressed three key topics he says are impacted by misinformation: COVID-19, crime rates and homelessness.