The Premier League has written to clubs informing them of plans to 'reward' teams who have the highest numbers of vaccinated players.
Chelsea midfielder N'Golo Kante was confirmed on Tuesday as the latest player to contract Covid, forcing him to miss his side's Champions League clash against Juventus on Wednesday night.
And Sportsmail can reveal that in a briefing note sent to clubs last week, the Premier League are stepping up their efforts to ensure more players are fully vaccinated due to fears over a slow uptake.
The Premier League will 'reward' clubs who have the highest numbers of vaccinated players
The document read: 'According to the data we have, only seven clubs' squads are more than 50 per cent fully vaccinated, so we have a way to go.