I think the most important thing is to ask CLEARLY for what you want. Do you have a specific list of social distancing practices you would like them to implemen

I think the most important thing is to ask CLEARLY for what you want. Do you have a specific list of social distancing practices you would like them to implement? Do you want them to stockpile supplies? How many supplies? What is on your shopping list? "Please take this seriously" is not a request. It's barely even english. It also contains an out of context judgement which you should also try to avoid. Use objective observations instead. So rather than saying "I think you're irresponsible", tell them the actual concrete things they said or did, that led you to that assessment. Something like "I notice you rode the bus during peak hours five times last week." is an example of an objective observation, devoid of judgement or criticism.