Senator Rand Paul, R-Ky., introduced legislation this week that would eliminate federal liability protections for vaccine manufacturers, which is a legal shield that has been in place for four decades. The bill, cosponsored by Sen. Mike Lee, R-Utah, was referred to the Senate Committee on Health, Education, Labor, and Pensions. If passed, the bill will make changes to the federal law to abolish the liability shield provided to vaccine manufacturers under the 1986 National Childhood Vaccine Injury Act, which largely protects vaccine manufacturers from product liability lawsuits and requires most injury claims to be directed to a federal compensation program....