Having spent many years in the food industry , I can assure you fresh means loads of bugs , Pasteurised means not as many bugs and sterilized means just a few bugs . Aseptic cartoning means that the cardboard packaging and the air is sprayed with Hydrogen Peroxide as a disinfectant , no bugs means you are eating something sprayed with chemical , Sunny Delight was the well known one , it took two days before the Sulphur Dioxide dropped to safe levels and made it not poisonous . The unpasteurised milk that came from our youth , we eulogise over the cream level , killed millions with Tuberculosis , bacteria , virus , yeasts and moulds , are all hard to kill off , the only way to do it is extreme heat for a prolonged time , as in tinned food where it is sealed in , but remember the fray Bentos Corned Beef scare of the 1960's and a couple of salmon ones too , or you use chemical disinfectants , your choice . Me ? I prefer fresh even with the stuff attached to it