Research done on Eggs

Avian Flu
Avian influenza is an infection caused by avian (bird) influenza (flu) viruses. These influenza viruses occur naturally among birds. Wild birds worldwide carry the viruses in their intestines, but usually do not get sick from them. However, avian influenza is very contagious among birds and can make some domesticated birds, including chickens, ducks, and turkeys, very sick and kill them. Avian flu virus is found on the surface of the egg. It is transmitted to human through direct contact of raw poultry.

Source: http://www.cdc.gov/flu/avian/gen-info/avian-flu-humans.htm

Since eggs are affected by Avian flu virus, people are eating lesser eggs products.
Here are some substitutes for eggs:
Egg
Amount: 1 whole egg
Substitute:
- 1/4 cup egg substitute (examples include: Egg Beaters, Second Nature, Scramblers); check label for specific directions
- Reconstituted powdered eggs; follow package directions - 2 tablespoons mayonnaise (suitable for use in cake batter). NOTE: If you type "mayonnaise cake recipe" into your favorite Internet search engine, you'll find several recipes for cakes made with mayonnaise and NO eggs. This may help you decide if this substitution will work for your cake. - 1/2 teaspoon baking powder plus 1 tablespoon vinegar plus 1 tablespoon liquid (for baking use only)

TIP: If you don't use eggs very often, you may find it helpful to keep some powdered eggs on hand.
Egg replacer can also be used. Eg Ener-g egg replacer (A blend of raising ingredients and stabiliser in a potato starch and tapioca flour base)

Sources:
http://lancaster.unl.edu/food/ciqsubs.shtml
http://www.goodnessdirect.co.uk/cgi-local/frameset/sect/FCIE.html

Playing It Safe With EggsWhat Consumers Need to Know
To avoid the possibility of foodborne illness, fresh eggs must be handled carefully. Even eggs with clean, uncracked shells may occasionally contain bacteria called Salmonella that can cause an intestinal infection. The most effective way to prevent egg-related illness is by knowing how to buy, store, handle and cook eggs—or foods that contain them—safely. That is why the U.S. Food and Drug Administration (FDA) requires all cartons of shell eggs that have not been treated to destroy Salmonella must carry the following safe handling statement:
Safe Handling Instructions: To prevent illness from bacteria: keep eggs refrigerated, cook eggs until yolks are firm, and cook foods containing eggs thoroughly.

Source: http://www.cfsan.fda.gov/~dms/fs-eggs.html