The goal of this clinical trial study is to investigate the role of anthropometric indices and Vit-D supplementation on BioNTech, Pfizer vaccine side effect and immunoglobulin G response against SARS-CoV-2 in individuals infected with COVID-19. The main question\[s\] it aims to answer are: 1. BMI has role in reduce BioNTech, Pfizer vaccine side effect 2. BMI has role in improve IgG titer 3. Vit-D supplementation has role in reduce BioNTech, Pfizer vaccine side effect 4. Vit-D supplementation has role in improve IgG titer
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Vit-D supplementation has role in reduce BioNTech, Pfizer vaccine side effect
Timeframe: 16 weeks