Table 1.
Characteristics of included prevalence studies.
| First author | Published time | Country | Patients with COVID-19 | Patients with COVID-19–Influenza co-infection (%) | IV-A | IV-B | Co-infected patients | |
|---|---|---|---|---|---|---|---|---|
| Mean age | Male/Female | |||||||
| Castillo et al. (8) | July, 2020 | USA | 42 | 1 (2.4) | 1 | 0 | 21 | 1/0 |
| Ding et al. (9) | March, 2020 | China | 115 | 5 (4.3) | 3 | 2 | 50.2 | 2/3 |
| Garazzino et al. (10) | May, 2020 | Italy | 168 | 1 (0.6) | 1 | nr | nr | Nr |
| Hashemi1 et al. (11) | July, 2020 | Iran | 105 | 23 (21.9) | 23 | 0 | nr | 14/9 |
| Hu et al. (12) | March, 2020 | China | 70 | 32 (45.7) | 32 | 0 | 62.8 | 13/19 |
| Kim et al. (13) | April, 2020 | USA | 116 | 1 (0.9) | 1 | 0 | 74 | Nr |
| Leuzinger et al. (14) | July, 2020 | Switzerland | 930 | 2 (0.2) | 2 | 0 | >16 | Nr |
| de Suoza Luca et al. (15) | May, 2020 | Brazil | 115 | 1 (0.9) | 0 | 1 | 36 | Nr |
| Ma et al. (16) | Jun, 2020 | China | 250 | 3 (1.2) | 2 | 1 | nr | Nr |
| Takahashi et al. (17) | Sep, 2020 | USA | 902 | 3 (0.3) | nr | Nr | nr | Nr |
| Zhu et al. (18) | May, 2020 | China | 257 | 7 (2.7) | 2 | 5 | 15–44 | Nr |
All studies used real time-polymerase chain reaction (RT-PCR) as their detection method except Hu study which used Elisa method, Ding et al., and Hashemi et al. which did not provided information of their detection method. nr, not reported; IV-A, Influenza Virus A; IV-B, Influenza Virus B.