The 20th century added vaccination, refrigeration, smoking cessation, and antibiotics.
Like most canned foods, its primary reason for existence is a long shelf life and no need for refrigeration.
But unable to afford the cost of 50 years of refrigeration, he opted for the cut-rate freezing of his head only.
late 15c., "act of cooling or freezing," from Latin refrigerationem (nominative refrigeratio) "a cooling, mitigation of heat," especially in sickness, noun of action from past participle stem of refrigerare, from re- "again" (see re-) + frigerare "make cool," from frigus (genitive frigoris) "cold" (see frigid). Specifically "freezing provisions as a means of preserving them" from 1881.
refrigeration re·frig·er·a·tion (rĭ-frĭj'ə-rā'shən)
The act or process of cooling a substance.
The act or process of preserving by cooling.
The reducing of a fever.