Before revision:  As the Coronavirus Pandemic of 2019/2020 unfolds, a COVID-19 'Immunity Passport' has been mooted as a way to enable individuals , especially those in healthcare and other key industries, to return safely back to work at 'the right moment'.
After revision:  As the Coronavirus Pandemic of 2019/2020 unfolds, a COVID-19 'Immunity Passport' has been mooted as a way to enable individuals to return back to work at 'the right moment'.