Table 2.
Comparison of the results of other studies with the current research.
| Author, year | Country | Population | Sample size | IgG | IgM | IgG or IgM | Date of sampling | The onset of the epidemic |
|---|---|---|---|---|---|---|---|---|
| Pollán, 2020 | Spain | Healthcare | 1109 | 10.2% | — | — | April 27 to May 11, 2020 | March 2020 |
| Javed, 2020 | Pakistan | Healthcare | 3120 | 4.6% | 4.1% | 8.3% | NM | April 2020 |
| Valenti, 2020 | Italy (Milan) | Healthcare | 37 | — | — | 5.4% | February 24 to April 8, 2020 | March 2020 |
| Comar, 2020 | Italy (Trieste) | Healthcare | 727 | — | — | 17.2% | April 2020 | March 2020 |
| Garcia-basteiro, 2020 | Spain (Barcelona) | Healthcare | 578 | — | — | 9.3 and | From 28 March to 9 April 2020 | March 2020 |
| Alserehi, 2020 | Saudi Arabia | Healthcare | 12621 | 2.3% | May 2020 | March 2020 | ||
| Venugopal, 2020 | United States (New York City) | Health care | 500 | 27% | May 2020 | April 2020 | ||
| Amendola, 2020 | Italy (Lombardy) | Healthcare | 742 | 5.13% | April 2020 | March 2020 | ||
| Yogo, 2020 | United States (San Diego) | Healthcare | 1770 | 2.2% | May 2020 | March 2020 | ||
| Shakiba, 2020 | Iran (Guilan) | Healthcare | 44 | — | — | 29% | April 2020 | February 2020 |
| Our study | Iran (Guilan) | Healthcare | 503 | 33.3% | 5.6% | 39% | April 2020 | February 2020 |