Ethics statement
This study was conducted as a service evaluation of the CUHNFT staff
testing services and PPE policy (CUHNFT clinical project ID3738). As a
study of healthcare-associated infections, this investigation is exempt
from requiring ethical approval under Section 251 of the NHS Act 2006
(see also the NHS Health Research Authority algorithm, available at
http://www.hra-decision-tools.org.uk/research/, which concludes that no
formal ethical approval is required).