Either pens ir vials.
Genetically engineered bacteria produces human insulin . Bacteria population in large fermentation tank double in size every two hours. Purified human insulin. Either packed in pens or vials. Pens are more safe and convenient than vial and Syring , accurate dose labels , easy to carry ,small and thun needle size which reduces fear and pain , time saving due ti prefilled and preset insulin dose.
Vial is mostly used in hospital setting .
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