Mandatory masks on NZ public transport, but are they even effective?
https://jamesfetzer.org/2020/08/studies-of-surgical-masks-efficacy-masks-are-useless-in-preventing-the-spread-of-disease/
https://jamesfetzer.org/2020/08/studies-of-surgical-masks-efficacy-masks-are-useless-in-preventing-the-spread-of-disease/