Fig. 2
From: Respiratory viral infections and the risk of rheumatoid arthritis
Effects of ambient respiratory viral infections on incident RA. Parainfluenza (a), coronavirus (b), and metapneumovirus (c) infection. The x- and y-axes represent the weekly virus detection rate as a percentage and difference from the mean log relative risk of incident RA, respectively. Solid lines represent the associations between the weekly virus detection rate and weekly number of incident RA cases, and the gray area represents 95% confidence intervals for the risk