[...] CVS Health pulled tobacco from its store shelves. The nation's second-largest drugstore chain is developing a new tobacco-free pharmacy network for clients of its Caremark pharmacy benefits management business. Drugstore chains, grocers and big retailers like Target have delved deeper into customer health in recent years, in part to serve the aging baby boom generation and the millions of uninsured people who are expected to gain coverage under the federal health care overhaul. CVS has said it might lose about $2 billion in revenue annually after removing tobacco, but company leaders expect to counter that loss at least partially by expanding the company's health care business.