How to politely pursuade a lay person/Bhante to wear a mask?

To wear a mask in the covid pandemic is not a precept in Buddhism. I noticed many lay person and even many high level monks not wearing mask when talking to a stranger. Q1) How do i politely persuade them to wear a mask ? Bhante said since i already double masked with a face shield then Bhante not require to wear mask. Some Bhante will say can we move from outdoor to indoor so nobody noticed we're not wearing mask and no police catching. Indoor infectivity rate is about 20 times higher. I am trying to have conversation with Bhante at outdoor to reduce the infectivity rate. Q2) I am thinking always keep extra high quality mask to offer to someone or Bhante when i need to talk to them. How if they refuse to wear it then what should i do? Q3) In Buddhism, precepts are so difficult to practice but can follow, vice versa i don't understand why simple SOP (Standard Operating Procedure) or simple wisdom and compassion cannot do like a wearing mask. Isn't Buddhism fundamental is a path of wisdom and compassion with good deed for well being even not written in any Sutta ? Isn't not wearing a mask may against the precept #1 in Buddhism yet cause and effect may multiples to a billion people in very short period of time? Cause of infection found very frequent and high at Temple/Church/Mosque.