That's probably something you'd have to do heavy research on to figure out dosing.
I think there may be some published studies, but of course you'd need to read them carefully so they are not taken out of context.
Are you trying to treat Marek's within your flock? I've seen where some also use Baicalin but can't tell you much about that either. If you do an onsite search, I'm sure you'll find more information.