While vaccines remain the best strategy to prevent COVID-19, mAbs could potentially benefit certain vulnerable populations before or after exposure to SARS-CoV-2, such as the unvaccinated or recently vaccinated high-risk patients.
use date_treated as input in start_date to avoid repeating each therapeutic
make the two require-hospitalisation flags (primary diag covid + any diag covid) consistent ie. both limited to emergency only; also add an early date limit rather than "ever" prior to start date (may wish to extend this a bit further?)
ethnicity on or before
remove with_these_therapeutics from region (just having with_these_indications = "non_hospitalised" does same job and is easier, avoids having to add new therapeutics to list)
impose upper date limits on outcomes (may wish to adjust these but having some limit seems sensible)