Health Highlights: March 8, 2021

U.K. Schools Reopen With Extensive COVID-19 Testing

A rigorous coronavirus testing system will be in place as U.K. students return to school Monday after classrooms were closed for two months.

Millions of high school and college students will be tested for the first few weeks after they return. The goal is to quickly identify and isolate asymptomatic cases to avoid outbreaks and school closures, the Associated Press reported.

This is the first phase in the government's plan to lift pandemic restrictions as vaccinations increase, with the aim of lifting all restrictions by June.

The reopening of schools gets the U.K. "moving closer to a sense of normality," Prime Minister Boris Johnson said Sunday, the AP reported.

High schools and colleges will reopen in phases to allow for three rounds of testing. Students will then get kits so they can test themselves twice more at home. The U.K. government has distributed nearly 57 million rapid "lateral flow" test kits to schools across the country, but there are concerns about the accuracy of the tests, the AP reported.

But a senior British public health official said Sunday that the risk of a false positive was very low.

Evidence from testing over the past eight weeks indicates "the risk of false positives is extremely low, less than 1 in 1,000," Susan Hopkins, the COVID-19 strategic response director for Public Health England, told the BBC. "And a test that returns less than 1 in 1,000 false positives is a very good test."

Britain has had deadliest coronavirus outbreak in Europe, with nearly 125,000 lives lost so far. Its coronavirus vaccination program has, however, raced ahead of the United States and the European Union to give at least a first dose to nearly 22 million British adults so far.

Three vaccines are approved for use in the U.K. -- made by Pfizer, Moderna and AstraZeneca -- and the country plans to vaccinate all adults by July, the AP reported.

Relaxed Restrictions Likely to Lead to New Wave of COVID-19 Cases and Deaths: CDC

A new wave of COVID-19 cases and deaths is likely in the United States as a growing number of state governors relax public health restrictions, researchers from the U.S. Centers for Disease Control and Prevention warn.

Mask mandates implemented in states last year were associated with a nearly 2% decline in the rate of newly reported COVID-19 deaths in the 100 days after the rules took effect, while there was an up to 3% increase in new COVID-19 deaths in the months after some states allowed restaurants to reopen for in-person dining, the CDC researchers reported in the agency's Morbidity and Mortality Weekly Report last week, according to CBS News.

"This report is a critical reminder that with the current levels of COVID-19 in communities, and the continued spread of more transmissible virus variants, which have now been detected in 48 states, strictly following prevention measures remains essential," CDC Director Dr. Rochelle Walensky told reporters on Friday.

This is not the first report showing that public health restrictions can slow the pandemic, Walensky noted. Last month, the CDC said there was a 5.6% decrease in the rate of new COVID-19 hospitalizations among adults aged 18-64 after some statewide mask mandates were introduced, CBS News reported.

"I think we've known that restaurants have led to cases, have led to clusters," Walensky said.

U.S. health officials have warned that country's recent drop in COVID-19 cases has stalled. Though cases have plummeted in recent weeks after hitting record highs after the holidays, CDC data show cases are still far higher than the first peak of the pandemic last April, CBS News reported.