95% CI(7) COVID-19(7) Care(7) Admission(5) National Health Service(5) was used(5) hospital(5) risk(5) Health(5) Result(5) Patient(5) prevalence of COVID-19(4) occurred(4) Volume(4) Medicines(3) Modification(3) Mortality(3) clinical guideline(3) reported(3) reduce(3) Quality improvement(3) Nurses(3) intravenous(3) participant(3) Direct(3) greater(3) increase(3) moderate-severe(3) National(3) patient safety(3)