The Dallas Cowboys are the latest team to deal with COVID-19 issues, as CeeDee Lamb, Malik Hooker and Israel Mukuamu were placed on the COVID-19 reserve list.
It is unknown if any of the players tested positive or if they were high-risk close contacts. All three will miss some time while quarantining.
High-risk close contacts must isolate for five days if unvaccinated, while vaccinated players and coaches don't need to isolate after exposure. Vaccinated individuals can return after two consecutive negative tests 24 hours apart. Unvaccinated individuals who test positive must isolate for at least 10 days before producing two consecutive negative tests.
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The Cowboys held meetings virtually on Monday.
"I think just like most things we do we're just being cautious and want to make sure we contain this outbreak and just be smart with that," Cowboys coach Mike McCarthy said. "We have enough experience with the virtual format."