Figure Legends
Fig 1. Comparison of serum concentration of MMP3 between the COVID-19 infected group and non-infected group. Box above with the median as a line shows the distance between the quartiles, and the maximum and minimum values of MMP3 were presented by the whiskers. Outliers are displayed as separate points. The P-values show that there was significant difference between groups.
Fig 2. Changes of serum MMP3 concentration in novel coronavirus patients during hospitalization. The interval of each test was 6 days, and a total of 5 times were tested. Box above with the median as a line shows the distance between the quartiles, and the maximum and minimum values of MMP3 were presented by the whiskers. Outliers are displayed as separate points.