My mother is showing signs of covid

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So she is 68 and has copd and a bad heart and I have been telling her to be careful since this started. Today she told me she was throwing up has a headache and has diarrhea. I made her call in and now she is going to the hospital cause she is showing signs of covid.

Please someone tell me is showing signs another word for positive..

An I will update when I know more.