AstraZeneca has probably the best antibiotic pipeline in the industry. It's also a business they no longer want to be in.
Their departure would follow on the heels of Pfizer exiting that segment, leaving GlaxoSmithKline and Merck.
Why? Well, pharmaceuticals in general in crisis. I have likened it to the US steel industry in the 1970s. Critics think if they are still making money, it must be okay and they can hammer on them indefinitely. But that isn't how business works. If government-controlled academia has to take over pharmaceutical development, we are doomed.