A teacher wearing a face shield interacts with a pupil during the first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

Pupils wash their hands on their first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

A teacher wearing a face shield interacts with a pupil during the first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

Pupils work behind protective screens on their first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

A hand sanitiser stands near pupils sitting in a classroom on their first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

Pupils walk between lessons on their first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

Pupils wash their hands on their first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

Children sit in a classroom on their first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

Children sit in a classroom on their first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton at Stone, Britain September 3, 2020. REUTERS/Andrew Couldridge

A student sitting in a classroom looks at a screen instructing children what will happen when someone in school shows symptoms of COVID-19, on her first day of school at Heath Mount, amid the outbreak of the coronavirus disease (COVID-19), in Watton, Britain September 3, 2020. REUTERS/Andrew Couldridge

A student reacts as she checks her GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student reacts as he checks his GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

The highest achieving students Harris, Gwen and Barney pose for a photograph in front of the school after achieving 11 Grade 9's in their GCSE results, at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student checks her GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A mother of a student reacts as she checks his GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student reacts after she received her GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student checks his GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student reacts as she checks her GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student checks her GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

Students react as they check their GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student reacts as she checks her GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student reacts as he checks his GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student checks his GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

A student reacts as she checks her GCSE results at Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 20, 2020. REUTERS/Molly Darlington

Sixth form students are seen after receiving their A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student wearing a protective mask reacts after receiving her A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student looks at his A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student is embraced after receiving her A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student wearing a protective mask opens an envelope containing his A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student reacts after receiving his A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student reacts after receiving his A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student speaks on the phone after receiving her A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student looks at her A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student is embraced after receiving her A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

A sixth form student reacts after receiving her A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

Sixth form students react after receiving their A-Level results at The Crossley Heath Grammar School, amid the spread of the coronavirus disease (COVID-19), in Halifax, Britain August 13, 2020. REUTERS/Molly Darlington

U.S. Heath Secretary Alex Azar and Taiwan's Foreign Minister Joseph Wu hold a joint news conference in Taipei, Taiwan, August 11, 2020. REUTERS/Ann Wang

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

A fan carries a beer as he attends the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

A fan carries beers as he attends the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

A fan holds beers as he attends the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Disinfectant is placed on the field as fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls TPX IMAGES OF THE DAY

Fans attend the Surrey v Middlesex cricket match for the first time following the outbreak of the coronavirus disease (COVID-19), in London, Britain, July 26, 2020. REUTERS/Henry Nicholls