While extreme high or low temperatures technically do not kill viruses, the influenza virus and many others are deactivated at temperatures ranging from 165 to 212 degrees Fahrenheit, the boiling point for water. Since viruses lack many of the basic structures and functions necessary to be considered a living organism, they technically cannot die.
Since most viruses are deactivated at temperatures between 165 and 212 degrees Fahrenheit, food scientists advise to heat up meat to at least 165 degrees before serving. These temperatures kill bacteria, as well.
Viruses can withstand freezing temperatures, however. There are known HIV infection cases in which contaminated frozen human material has been implanted into a recipient and infected the patient.