mom will not self isolate

Long rant but I need advice.

I am 19 I am living at home with my mom right now because of the outbreak. it is only the two of us in the house. I have not left the house or gone into risky places in 11 days. My mom on the other hand, goes out every single morning with her boyfriend to go on a hike. she drives to his house meets him and says hi to his daughter and then they hike for a few hours. I know they are not staying 6 feet apart because well they’re boyfriend and girlfriend. My moms boyfriend is the CEO of a vaccine company that works for the government so his office is still open. he works from home when he can but apparently he is also still going into his office now and then and other staff is there too. sometimes his daughter tags along with him to the office but the point is that he is interacting with other people as well. According to my mom he’s being careful and washing his hands, doing all the right things blah blah blah. but my mom has also been walking around the neighborhood with her friends as well to “get fresh air” I have talked to her countless times about how her actions are making me really scared and uncomfortable for both our health. We have fought about her doing all this every single day since isolation started. She said she’s an adult and can make her own choices and she knows how to be safe. she has told me that she’s is keeping 100% up to date on the virus, reading medical journals and news from epidemiologists. She says i’m taking it too seriously and she will not listen to me no matter what I say about how it makes me feel. She is the most stubborn person and will not budge NO MATTER WHAT. I hate this situation that we are in because it has made our relationship really crappy because all the fighting we do around this now but she will just mot consider how I feel. I don’t know what to do. I feel very defeated. I guess I just have to live with it. I’ve tried to find articles and new sources that support what i’m trying to tell her but she always hits back at me with ones that she found validating her actions. sorry just really had to rant.