Lupus often fades with age. Scientists finally know why

It causes the immune system’s first-line viral defenses — known as interferons — to attack the body. Nearly every organ is at risk, leading to conditions like kidney and heart disease.

But unlike many other autoimmune or chronic illnesses, lupus can improve as patients reach their 60s and 70s.

“I see my younger lupus patients in their 20s, 30s, and 40s every few months, monitoring them closely for signs of severe disease, but many of my older…