Figure 2

Arthritis in congenic strains DBA.B-1^−/−(left Average score (severity), right Incidence) relative to BALB/c^−/−and DBA/1^−/−mice. BALB/c^−/− mice reached maximum levels of disease incidence and severity earlier than DBA.B-1^−/− mice, which did not reach their maximum levels until week 18. Disease severity measurements are expressed as a percentage of the maximal total score.