There isn’t a single test or blood work to tell you have long covid. Many of the symptoms from long covid overlap with several other conditions, but if your symptoms became worse or started after you had a covid 19 infection or had a covid 19 vaccine or booster, it is most likely from long covid. Taste and smell abnormalities are somewhat specific to long covid. More info here.
12 points or
higher and you have long covid according to this one study
| Symptom | Points |
| Anosmia/Parosmia | 8 |
| Postexertional malaise | 7 |
| Chronic cough | 4 |
| Brain fog | 3 |
| Thirst | 3 |
| Chest pain | 2 |
| Palpitations | 2 |
| Fatigue | 1 |
| Changes in sexual desire or capacity | 1 |
| Dizziness | 1 |
| Gastrointestinal symptoms | 1 |
| Abnormal movements | 1 |
Thaweethai T, Jolley SE,
Karlson EW, et al. Development of a definition of postacute sequelae of SARS-CoV-2
infection. JAMA. Published
online May 25, 2023. doi:10.1001/jama.2023.8823.