The Bolton manager has cautioned against expecting too much of the 23-year-old despite the rapid progress that has been made.
"Fabrice still has a long way to go," said Coyle.
"It has to be remembered that people have been in for 30 seconds, not 10 or 15 minutes.
"We all just wanted to see that big smile back on his face.
"What has happened is encouraging but he is still in intensive care and he is still seriously ill."