Final answer:
Workers' compensation claims may be denied if employees test positive for drugs or alcohol during post-accident testing.
Step-by-step explanation:
Workers' compensation claims can be denied if an employee tests positive for drugs or alcohol during post-accident testing in many states. This is because the use of drugs or alcohol may be considered a violation of workplace safety policies and could be seen as contributing to the accident. It is important for employees to understand the potential consequences of drug or alcohol use in relation to workers' comp claims.