Prescription drug

Where is Dermatophagoides Pteronyssinus and Quercus Alba Pollen made?

1 company sell it under their own name. None of their labels names the factory.

Companies and their factories

Company on the labelFactoryWhereLast FDA inspection
Antigen Laboratories, Inc. Treatment Set TS3375540.01 g per 1 mL / 2000 [AU] per 1 mL · NDC 49288-0792The label doesn't name the factory. Plants this company names for other drugs