Original: Effectiveness of pasteurization Milk pasteurization has been subject to increasing scrutiny in recent years , due to the discovery of pathogens that are both widespread and heat resistant ( able to survive pasteurization in significant numbers ) .
Simplified: Milk pasteurization standards have been subject to increasing scrutiny in recent years , due to the discovery of pathogens that are both widespread and heat resistant ( able to survive pasteurization in significant numbers ) .