coronavirus vaccine have been destroyed after an employee accidentally turned off the fridge they were being stored in. The blunder was exposed by employees from the Palm Beach County Health Care District while conducting a 'quality assurance check' last Friday morning.All of the doses were rendered useless after the power supply to the fridge was accidentally turned off.The Pfizer - BioNTech vaccine needs to be stored at a temperature of -70C in order to preserve some of its components before it's transferred to a regular refrigerator five days before use.When exposed to warmer temperatures, the vaccine degrades and becomes ineffective.A statement from Palm Beach County officials aimed to reassure Americans, claiming it was a "single,.