AZN is not one of my favorite stocks; however, at current valuations, a buy-and-hold approach with any of the Big Pharma ought to work out well. In varying degrees, all Big Pharma are beneficiaries of The Global Demographic Tailwind. AZN was one of the first Big Pharma to make a serious investment in emerging markets, and it is still one of the strongest players there.
All told, I prefer NVS, ABT, and PFE for the reasons mentioned in #msg-65816175; however, I don’t think you can go far wrong by buying AZN at the current price.