This truly is a near impossible question to answer. I completely agree with @johnbishop. When trying to explain the concerns about COVID-19 to someone, even family, it is first important to understand why they may be resisting protective restrictions and evidence published by trusted medical sources. Even facts may not resonate when people are suffering due to financial concerns or they don't (yet) know anyone who has had the virus.

This article from Psychology Today sheds some light:
- Why Aren't Some People Taking COVID-19 More Seriously? https://www.psychologytoday.com/us/blog/psych-unseen/202003/why-arent-some-people-taking-covid-19-more-seriously

In the article, Cathy Cassata explains “optimism bias,” which is a general tendency that we all have whereby we tend to underestimate personal risks. It worth a read.

The WHO recommends when talking with others, stick to the facts. Even that can be a challenge because facts are changing every day, not to mention rumors and opinions that get mixed in with facts. Here's a tip sheet from the World Health Organization
https://www.who.int/docs/default-source/coronaviruse/covid19-stigma-guide.pdf
Stigma is a real issue. We shouldn't say it's young people or people in urban centers or rural communities or this or that group of people who are causing the problem. There are many people practicing good safety hygiene and there are people breaking and bending the rules everywhere.

Mayo Clinic is following COVID-19 very closely and publishing up-to-date information about COVID-19 at Mayo Clinic News Network. Follow this page for reliable information that support your efforts to stay safe, stay healthy and to discuss your concerns with others. https://newsnetwork.mayoclinic.org/category/covid-19/