Table 1.
Search strategy in PubMed database.
| Number | Search terms |
| #1 | Corona Virus Disease 2019 [Title/Abstract] |
| #2 | Novel coronavirus [Title/Abstract] |
| #3 | COVID-19 [Mesh] |
| #4 | SARS-CoV-2[Mesh] |
| #5 | #1 OR #2 OR #3 OR #4 |
| #6 | VC[Title/Abstract] |
| #7 | Vitamin C [Title/Abstract] |
| #8 | L-Ascorbic Acid [Title/Abstract] |
| #9 | L Ascorbic Acid[Title/Abstract] |
| #10 | Ascorbic Acid [Mesh] |
| #11 | #6 OR #7 OR #8 OR #9 OR #10 |
| #12 | Intravenous infusion [Title/Abstract] |
| #13 | Intravenous drip [Title/Abstract] |
| #14 | Drip, Intravenous [Title/Abstract] |
| #15 | Infusions, Intravenous [Mesh] |
| #16 | #12 OR #13 OR #14 OR #15 |
| #17 | #5 AND #11 AND #1 |