Covid-19 Investigation Question Title * 1. Did you have Covid-19? Yes No Question Title * 2. Did you test positive with severe symptoms? Yes No Question Title * 3. Were you hospitalized? Yes No Question Title * 4. Did you have comorbidities or risks conditions? Yes No Question Title * 5. Were you vaccinated at the time of Covid-19 infection? Yes No Question Title * 6. Did you test positive and with no or mild symptoms? Yes No Question Title * 7. Do you support your immune system? Yes No Question Title * 8. How your vitamin D level was at the time of the infection? Normal Low High I do not know Question Title * 9. Do you know your blood type? Yes No Question Title * 10. Is your blood type O, A, B, AB? O A B AB I do not know Done