In the 1962 case of Gallick v. Baltimore & Ohio Railroad Co., the U.S. Supreme Court ruled in favor of a worker who had contracted a severe infection after being bitten by insects near an infested, stagnant pool on his employer's property. The plaintiff, John Gallick, was employed at a railroad freight house owned by Baltimore & Ohio Railroad Company when he was bitten and subsequently developed encephalitis which led to paralysis. He sued for damages under the Federal Employers' Liability Act (FELA), arguing that his employer failed to maintain safe working conditions. The lower courts initially dismissed Gallick's claim stating that there wasn't sufficient evidence linking his injuries directly to his employment environment or negligence from the company. However, upon reaching the Supreme Court, it reversed this decision with Justice Tom C Clark writing for majority opinion. The court held that if an employee’s injury results from their employer’s negligence in providing safe working conditions - even if such injury is unforeseeable - then they are entitled to compensation under FELA as long as "the proofs justify with reason" that "employer negligence played any part" in producing harm.

In the dissenting opinion for Gallick v. Baltimore & Ohio Railroad Co., it was argued that the majority's decision to uphold a jury verdict in favor of the plaintiff, despite lack of evidence directly linking defendant's actions to plaintiff's injuries, set a dangerous precedent. The dissenters believed that this ruling could potentially encourage speculative and unfounded lawsuits based on circumstantial evidence alone. They contended that there should be clear proof of causation between negligence and harm suffered by plaintiffs before holding defendants liable for damages. This view emphasized strict adherence to traditional tort principles requiring concrete demonstration of cause-and-effect relationships in personal injury cases.