| Cover | Mar. 15, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 15, 2022 |
| Entity File Number | 001-40064 |
| Entity Registrant Name | Virpax Pharmaceuticals, Inc. |
| Entity Central Index Key | 0001708331 |
| Entity Tax Identification Number | 82-1510982 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1055 Westlakes Drive |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | Berwyn |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19312 |
| City Area Code | 610 |
| Local Phone Number | 727-4597 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.00001 per share |
| Trading Symbol | VRPX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
