Several France players have caught colds, with Raphael Varane and Ibrahima Konate the latest to fall ill and miss training, the French Football Federation has confirmed.
Defender Dayot Upamecano and midfielder Adrien Rabiot were unavailable for the semi-final win over Morocco on Wednesday because of the illness.
Striker Randal Kolo Muani said the infected were isolating in their rooms.
France face Argentina in the World Cup final at 15:00 GMT on Sunday.
Forward Ousmane Dembele said: "We've been taking precautions and I think everyone will be ready."
Boss Didier Deschamps had said on Wednesday he expected Upamecano and Rabiot to be well enough for the final.