If you are afraid! don't drink!....way back then, younger, we have fresh milk delivered to the house in glass bottles by Dairy Farms & then later Vishnu's, later on, plastic bottles replaced glass ones. My point is, how do we know the milk come fresh, though it was delivered at around 6am everyday or those pressing the teats are clean?? etc...Just drink & eat in faith!...if you have none...don't drink or eat!