2.8. Synthesis and analysis of data
The Statistical Package for the Social Sciences (SPSS) 23.0 software was used to synthesize and analyze the descriptive data. Categorical data such as: gender, history/comorbidities (present and not present), COVID-19 test (positive, negative, not described), Type of COVID-19 vaccine, dose, symptoms, and treatment were expressed as proportions (%) and numerical data such as: age and time to symptom onset as mean ± standard deviation (SD). All the results of the study were grouped in a table.