Salisbury, United Kingdom
Britain's Prime Minister Boris Johnson visits the Public Health England site at Porton Down science park,...
Britain's Prime Minister Boris Johnson wearing a face mask speaks with Dr Tim Brooks, Director PHE Porton Down Alex Sienkiewicz and scientist Cathy Rowe during a visit to the serology laboratory on the the Public Health England site at the Porton Down science park, near Salisbury, Britain November 27, 2020. Adrian Dennis/Pool via REUTERS