New research from two London hospital maternity units published in Anaesthesia (a journal of the Association of Anaesthetists) shows that 1 in 6 maternity workers tested positive for COVID-19 antibodies, showing they have had a previous infection. Of those testing positive, 1 in 3 were completely asymptomatic.
Source: 1 in 6 maternity workers have had COVID-19, of whom 1 in 3 were completely asymptomatic