A friend has now caught COVID for the third time

[Tanuki]

13. Call your local Adult Protective Services before those two vulnerable elders

your friend is "caring for" are killed or maimed by her negligence. Your report will be kept confidential and you cannot be identified as the source. If you can't figure out how to get in touch, you can call 211. Also, your friend should be in quarantine if in fact she has a new onset of symptoms. Your second call should be to your local health department to report her refusal to quarantine. She is a menace. Having said that, I am a tad suspicious of what she has told you. Third separate case of covid?