At the time, it was pretty clear to me from the guidance given that: 1. The efficacy of masks for protecting against SARS-CoV-2 was unknown; 2. People in high

At the time, it was pretty clear to me from the guidance given that: 1. The efficacy of masks for protecting against SARS-CoV-2 was unknown; 2. People in high risk professions will need to wear them as a precaution even if they might not be as effective as we would like, so the advise to the public was to not buy them for this reason