I'm sure someone's asked about this before, but I couldn't find any good posts on it. So my mom got the "Flu/a cold" and while later she got better for the most part, but after a week or so, she has a persistent cough and has lost her voice. There hasn't been too much of an improvement in her voice for about a week or so.

I know there's probably very little I can do to help (She's vaccinated, and parents in general are very against ivermectin or literally any other solution that isn't fed to them by the media), but thought I'd ask for advice.

I got her to take Vitamin C, and D, and she's using Honey and hot tea to soothe her throat. Is there anything else that I could recommend? I've considered mentioning low percentage hydrogen peroxide in a humidifier, but my guess is she'll take one look online and see that it's "controversial" and not even consider it. Anything that could work, but isn't talked about online enough to be dissed by the media?

Semi related/unrelated rant. My sister (below 18) is vaccinated, just got boosted recently. She caught covid within a week of getting the shot, got better, and then got the flu (right after getting the flu shot as well). Mom got the booster, got sick like a week or two later, and is now dealing with this. My cousin's mom is all vaccinated/boosted, even banned me from her house for a year cause I refused. in the last 3 months she's been in the hospital for blood clotting in her lungs, and now I've just heard that she may have thyroid cancer. And yet here I am, not vaccinated (since I've been an adult at least, still was forced into getting some when I was a young kid), haven't worn a mask except for when it was 100% mandated/forced, and I still haven't caught so much as a cold since before the beginning of the pandemic (maybe 2018-2019 or something was the last time I had a mild cold?) Yet STILL these people, or just about anyone I know won't listen to a word I say, and will take every chance they get to "dis" my choice of not getting the vaccine. Like holy hell you guys, what more has to happen for some of these people to realize?

Sorry, I'm just super annoyed, want to help everyone as much as I can, but feel like I'm getting nowhere solely because people won't even listen to what I have to say.