We were able to identify, for those cytokines with higher values among PC than nPC at month 1, the best cut-off point using a ROC analysis for IL-1ꞵ (7.36 μg/mL and AUC: 0.709), MIP-1α (21.20 μg/mL and AUC: 0.691) and TNF-α (18.1 μg/mL and AUC: 0.682) above which the risk of having post COVID-19 symptoms at month 6 was significantly higher. Here, TNF is linked to COVID-19.