Oral Fluid Inflammatory Biomarker Profile in Long COVID: Evaluation of Oral Active and Total MMP-8, MMP-9, and TIMP-1 in Relation to BMI and Disease Status — Aji et al
"These findings suggest altered oral protease regulation in LC, while the concurrent increase in TIMP-1 may reflect a compensatory antiprotease response."
https://www.ijidonline.com/article/S1201-9712(26)00818-0/abstract