by the new requirements-- get vaccinated, or pay the consequences. >> we're in the tough stretch, and it could last for a while. >> reporter: tonight, president biden acknowledged that the covid challenge is crippling the country, warning things won't improve until the unvaccinated get their shots. >> many of us are frustrated with the nearly 80 million americans who are still not vaccinated, even though the vaccine is safe, effective, and free. >> reporter: and so, today, the president announced the most sweeping rules to date. all nine million federal and contract workers must be vaccinated, or face losing their jobs. private sector companies with over 100 employees must require vaccinations or weekly testing. that accounts for 80 million workers. businesses that don't comply will face fines. vaccinations will also be required for the more than 17 million people who work at hospitals that receive medicare