from that page: shelf life of a room temp egg is 21 days; for a refrigerated one it's 50 days. Eggs are washed to control salmonella (eggs are also somewhat dirty when laid, having likely touched poop). US started washing eggs in 1970. Japan started in the 1990's after a salmonella outbreak. Scandinavia also washes. Countries that don't wash-and-refrigerate can require vaccinating chickens against salmonella. It is also commonly recommended to wash unwashed eggs before cracking them.
from that page: shelf life of a room temp egg is 21 days; for a refrigerated one it's 50 days. Eggs are washed to control salmonella (eggs are also somewhat dirty when laid, having likely touched poop). US started washing eggs in 1970. Japan started in the 1990's after a salmonella outbreak. Scandinavia also washes. Countries that don't wash-and-refrigerate can require vaccinating chickens against salmonella. It is also commonly recommended to wash unwashed eggs before cracking them.