Table 2 Searching strategy
Serial number | Databases | Number of the article found | Number of the article included | Number of Excluded article | Reason for exclusion |
|---|---|---|---|---|---|
1 | PubMed | n= | n= | n= | Â |
2 | Google Scholar | n= | n= | n= | Â |
3 | Web of Science | n= | n= | n= | Â |
4 | Cochran Library | n= | n= | n= | Â |
5 | Africa Wide Knowledge | n= | n= | n= | Â |
6 | Africa Index Medicus | n= | n= | n= | Â |
7 | Microsoft Academic | n= | n= | n= | Â |
8 | WHO COVID-19 database | n= | n= | n= | Â |
9 | Unpublished (pre-prent, manuscript, thesis and report from WHO,CDC) | n= | n= | n= | Â |