In the case of Lyme, active infection past the 4 week mark is expected to show IgG antibodies. After treatment and resolution of the illness, tests can still show IgG antibodies. And so, IgG can represent either current or past infection.
What Really Happened to Seal's Countenance. But Seal's scars are not the result of violence. Jet reported that Seal's facial scars are the result of the disease lupus. At age 23, Seal developed discoid lupus erythematosus (DLE), a rare form of the disease causing scars. Source: Celebrities Who Have Overcome Obstacles, Jet, June 10, 1996, available at books.google.com.
Jackson suffered from vitiligo, a condition that causes the skin to lose pigment. That too was noted in the report. The report concluded that Jackson was suffering from a host of ailments when he died, including chronic lung inflammation, respiratory bronchiolitis, diffuse congestion and patchy hemorrhage of right and left lungs.