The stove-top flash-heat method of pasteurization described below has been shown in international research to kill HIV, E. coli., Staph aureus and Strep A & B, while protecting important vitamins and nutrient composition of the milk.
You can read research details here:
While alternative methods of pasteurization require considerable expenditure, time, and/or skill, the 7-step method described below is universally accessible and does not even require a thermometer.
Step1: Wash hands with warm water and soap, rinse, and dry with clean,dry towel.
Step 2: Place thawed breastmilk into a clean glass jar.
Step 3: Place glass jar into a pot.
Step 4: Pour COLD water into the pot (not the glass jar). The amount of cold water in the pot should be 2 finger-widths higher than the amount of breastmilk in the glass jar.
Step 5: Place the pot containing the jar on the stove or other heat source and bring the water to a boil.
Step 6: Heat the milk to 145 degrees Fahrenheit, stirring occasionally. Hold the temperature at 145 degrees Fahrenheit for 30 minutes.
Step7: Remove the jar of milk and cover the jar with a clean lid and hold under cold water or immerse in an ice bath to rapidly cool the milk to 40 degrees Fahrenheit. The milk is now ready for use! Store in the same covered glass jar at room temperature for 6 hours, or in a refrigerator up to 24 hours.
Do not refreeze.