Our immune system has a dark side: It’s supposed to fight off invaders to keep us healthy. But sometimes it turns traitor and attacks our own cells and tissues.

What are called autoimmune diseases can affect just about every part of the body — even the brain — and tens of millions of people. While most common in women, these diseases can strike anyone, adults or children, and they’re on the rise.

New research is raising the prospect of treatments that might do more than tamp down symptoms. Dozens of clinical trials are testing ways to reprogram an out-of-whack immune system. Furthest along is a cancer treatment called CAR-T therapy that's had some promising early successes against lupus, myositis and certain other illnesses. It wipes out immune system B cells — both rogue and normal ones — and the theory is those that grow back are healthier. Other researchers are hunting ways to at least delay brewing autoimmune diseases, spurred by a drug that can buy some time before people show symptoms of Type 1 diabetes.

“This is probably the most exciting time that we’ve ever had to be in autoimmunity,” said Dr. Amit Saxena, a rheumatologist at NYU Langone Health.

Measles cases inched up slightly in the U.S. this past week, with a new county impacted in Texas and Colorado reporting a new outbreak.

There are 1,088 confirmed measles cases in the U.S., up 42 from last week, the Centers for Disease Control and Prevention said Friday. Texas, where the nation's biggest outbreak raged during the late winter and spring, reported 10 additional cases this week for a total of 738.

There are three other major outbreaks in North America.

One in Ontario, Canada, has resulted in 1,888 cases from mid-October through May 27. Another in Alberta, Canada, has sickened 628 as of Thursday. And the Mexican state of Chihuahua had 1,693 measles cases and three deaths as of Wednesday, according to data from the state health ministry.