Results
A total of 1031 articles were obtained using the electronic strategy
search. After removing of 78 duplicate articles, 1453 study were
remained for screening. Then, the full‐text of the articles was
evaluated and 1289 irrelevant articles were excluded. At the eligibility
check stage, 164 articles were examined and 155 of them were omitted.
Finally, 9 articles were included in this meta-analysis review,
according to PRISMA (Preferred reporting items for systematic review and
meta‐analysis) guideline. Figure 1 shows the review process for the
included studies.
Accordingly, this Meta-analysis shows the estimation of the influenza
prevalence among patients infected with COVID-19 (Table 1). In nine
cross sectional studies, the influenza prevalence among patients
infected with COVID-19 varied from 0.08 in Nowak study to 49.46% in
Simin Ma study. In the present study the clinical characterization among
patients infected with COVID-19 and influenza is shown in Table 2.