Zinc, Anti-oxidants such as vitamin c, vitamin d, and vitamin e in mass doses have proven to be effective in treatment. For Zinc, 100Mg first day, 100 MG second day, 50 mg day for at least 2 weeks after. C -1000 MG x2 daily 2 days, then 1000Mg daily for 2 weeks. D 5000 mg daily, E, 500 MG daily. See Israeli Study on covid + vitamin D clinical trials for more info. As for symptoms, it varies greatly from person to person. Most report flu-like symptoms. The problem is both the vaccines and the disease have a long list of side effects, that can range from weeks to months or longer.