Understanding the limitations of non-pharmaceutical interventions (NPIs) during the Covid-19 pandemic
The UK and many other countries saw the implementation of numerous non-pharmaceutical interventions (NPIs) during the Covid-19 pandemic. Policy-makers, clinicians and public health specialists need to be more aware of the limitations of observational studies in evaluating non- NPIs. The lack of high-quality randomised controlled trials (RCTs) during the Covid-19 made it difficult to isolate the specific effects of individual NPIs and disentangle them from the complex interplay of different interventions. While observational studies provided rapid insights in an evolving crisis, they also presented challenges due to confounding factors and the concurrent implementation of multiple NPIs. Prioritising adaptive frameworks for real-time RCTs, particularly cluster-randomized trials, in future health crises could strengthen the evidence base and provide more robust insights for policymakers. Although the UK has a good public health data infrastructure compared to many other countries, it can ...