Two former Merck ($MRK) employees lodged a whistleblower suit against the drugmaker, alleging that it overstated the effectiveness of its MMR vaccine. The False Claims Act lawsuit says Merck didn't revise its claims about the combination shot's efficacy, despite the fact that it had become less effective. So, the employees say, government health programs paid for the product for 10 years without knowing it didn't live up to the company's claims. Story