The outbreak in Baltimore previously forced the National Football League to reschedule the game between the Ravens (6-4) and Steelers (10-0) from Thanksgiving night to Sunday afternoon, but it is unclear if the pivotal AFC North game will be held.
"With the health and safety of players and staff remaining the highest priority, the Baltimore Ravens have determined that all further team activities will be conducted virtually today", the Ravens said in a statement.
On Tuesday, the Ravens canceled practice after learning of more positive coronavirus tests Tuesday morning, according to a source.
The week began with the news running backs Mark Ingram and J.K. Dobbins were added to the list, along with nose tackle Brandon Williams. The first Ravens matchup was then moved from Week 7 to the Steelers' originally scheduled bye on Week 8, and the Week 4 postponement became Pittsburgh's de facto bye week.
US, Russian crew blasts off for International Space Station
Since ending the space shuttle program in 2011, NASA has depended on Russian Federation to transport astronauts to the ISS. The spacecraft left for the space station from the Baikonur Cosmodrome in Kazakhstan at 1:45 am EDT or 11:15 am IST.
Campbell's status for Thursday's game was in doubt, as he was recovering from a calf injury that sidelined him for Sunday's loss to the Tennessee Titans.
This is the second time the undefeated Steelers have had a game moved because of Covid-19 and the decision brought an angry response from the Steelers players.
The NFL's other Thanksgiving matchups - Houston-Detroit and Washington-Dallas - are scheduled as planned.
Team officials announced earlier this week that Heinz Field will be limited to 2,500 people total - players, coaches and stadium staff - following new orders and advisories issued by the state.