An investigation found that the more than 500,000 slaughterhouse and meat processing plant workers have some of the most dangerous factory jobs in America.
OSHA is trying to learn more about injuries as they happen. The agency set a rule in 2015 that requires companies to report serious injuries within 24 hours.
Many manufacturers have gone to automated machines to process food. Yet it still takes thousands of workers to keep a modern beef plant up and running.
A whistleblower group says USDA officials are retaliating against meat inspectors who report inhumane treatment of animals at slaughterhouses.