181dbf4c_of_Health__Victoria__Australia__Research_findings
[Egg facts] You cannot tell by sight or smell whether an egg is contaminated with bacteria. Any bacteria present on the outside of an egg can enter the egg through cracks in the shell causing a potential health risk. Large eggs are more likely to crack than small ones. [Research findings] 
63% of people would throw away a cracked egg but almost one third said they would check it and use it.
Research: Eggs need TLC - Department of Health, Victoria, Australia
Research findings