How long to isolate

[Shallen]

I have a rooster and his flock of 5 hens that have a respiratory illness. Seemingly mild as Roo recovered in 2 days. I isolated him with his girls. How long should I keep them isolated after last symptom resolves?

 

[littledog]

Just to be safe, 2 weeks without any of them having symptoms should be good.

 

[Shallen]

Thanks!