Following his side’s 2-1 win against Portsmouth, Parkinson revealed that strikers Kieffer Moore and Sam Smith – who netted the opener against Pompey – were among those who had been struggling with illness.
But the Wrexham manager says he has no new concerns ahead of the contest with Nathan Jones’ Addicks.
“Yeah, one or two others as well (had been ill), but they’re all back in this morning. We were all off yesterday and back in today,” said Parkinson.
“It’s about getting the ones who didn’t play the right level of training, the ones who did play a second day of recovery and picking the team tomorrow to go and put a performance down at Charlton.”
January signing Zak Vyner was unavailable for the first three matches after joining Wrexham from Bristol City due to a toe injury.
The 28-year-old featured as a substitute in each of the league wins against Ipswich Town and Portsmouth in the past week and is now in a position to be used when called upon.
“Zak’s fine,” said Parkinson.
“It’s been good in a way that we’ve been doing well. It’s given the time to get his toe completely right. He’s training again today.”