How to get my best friend to take COVID-19 seriously?

I’ve tried to explain to my best friend that by ignoring the order to quarantine that she’d be putting immunocompromised people like my mom and my other relatives at risk. My mom could die. My best friend is all “I’m not going to stop living my life. Everyone who has gone out has accepted the risk of getting it.” And “everyone is going to get it eventually. You can’t expect everyone to stay home. You can’t act all high and mighty and better than everyone else. If your mom were young and healthy, you’d be going out too.” And I’ve even explained that there’s a difference between going out of necessity and going out because she’s bored, but she doesn’t care. It really hurts to think that she doesn’t care that she’s putting people at risk and being selfish. I think she’s really upset with me. What should I do?