TLR2 and COVID-19: Therefore, in this study, we propose an evaluation of epidemiological factors and SNP rs3804100 (Thymine to Cytosine, T to C) in the TLR2 gene of Health Institutions professionals in the city of Belém (capital of the State of Pará, Brazil) who worked during the first pandemic wave to analyze the relationship with symptomatology and clinical development of COVID-19.