The trial will for the first time provide access to evidence aimed at showing that drug companies flooded markets with opioids, knowing that they were addictive.
Some insurers defend PBMs, arguing that blaming them for high drug prices is unfair when drug companies are free to set their prices as high as they want.
Close to 1 million people in California alone cross to Mexico annually for health care, including to buy prescription drugs.
In the 1960s, measles infected about 3-4 million people in the U.S. each year. More than 48,000 were hospitalized. Up to 500 people died.