2.6. Data extraction process
The authors (F.R.T. and C.Q.N.) independently extracted the data of interest in a previously prepared Microsoft Excel template. Any disagreement was resolved by the authors (R.P.V. and N.L.C.G.). The extracted data included the most important characteristics of the studies such as the name of the first author, year of publication, sex, age, background/comorbidities, vaccine type, number of doses, time after COVID-19 vaccination, clinical manifestations, physical exam (signs)/ vital functions, laboratory, image tests, pathology (histology), final diagnostic, treatment (medical or surgical) and development -recovery time (medical or surgical).