http://www.newsweek.com/have-vaccines-ever-been-mandated-history-joe-biden-100-million-people-george-washington-1627750

In order to tackle the spread of COVID in the U.S., President Joe Biden made a U-turn on mandatory vaccination on Thursday when he announced that all federal employees must be vaccinated over the coming months or their jobs may be at risk.

The mandate could potentially affect up to 100 million Americans. Employers with more than 100 employees must ensure their workers are vaccinated or tested weekly, while federal contractors must be vaccinated. The move reflects measures employed in California and New York.