Origin or Source
     What is the origin of the serum?
     Is origin important?
     Are source and origin the same?
     Why should I be concerned about the traceability of serum to its origin?

Collection
     Is the method of collection important?
     Does it matter who collects the serum?
     What does "packer-collected" mean?
     What are serum brokers?
     Is a calf's age at the time of collection important?

Filtration
     Why is lot size important?
     Why is the filtration method important?
     What is "true pool" processing and how does it affect the processing of serum?

Testing & Processes
     What testing should be required?
     What post-filtration treatments should be considered?