Don't have to disregard facts, but you can of course pick up and detect biases. Hence why authors have to declare conflict of interest and acknowledgement.
This was a meta-study.
Objectives
To assess the effectiveness of physical interventions to interrupt or reduce the spread of acute respiratory viruses.
Search methods
We searched CENTRAL, PubMed, Embase, CINAHL, and two trials registers in October 2022, with backwards and forwards citation analysis on the new studies.
Selection criteria
We included randomised controlled trials (RCTs) and cluster‐RCTs investigating physical interventions (screening at entry ports, isolation, quarantine, physical distancing, personal protection, hand hygiene, face masks, glasses, and gargling) to prevent respiratory virus transmission.