Effectiveness of non-pharmaceutical interventions vs. COVID

Major meta study by the Royal Society

During the early stages of the pandemic, public health authorities had to rely on non-pharmaceutical interventions (NPIs) in an attempt to curb SARS-CoV-2 transmission rates, as there was no access to vaccines and therapeutics. NPIs comprise a variety of actions including, amongst other measures, social distancing, face coverings and contact tracing. In this theme issue, evidence gathered during the pandemic is examined to understand whether each of these measures was effective at reducing the transmission of SARS-CoV-2.

Masks good.  N95> surgical masks 

Many other insights though for many NPIs, “inconclusive “ for a variety of reasons, usually insufficient data