ADVICE NEEDED: Covid19 vs Hepatitis C

My mom got diagnosed with covid19 2 days ago. No symptoms, no fever, nothing. She's 64. For the past 50 years she's been suffering from hepatitis C which she only found out about 2 years ago. Since she's a health worker she had to take a vaccine 2 weeks ago. Any advice on diet or other things that can be done to protect her from any complications ? How does one virus interact with the other? Does anyone have any info?

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