Ready Made White Icing Are Egg Whites Safe To Consume Raw?

Are egg whites safe to consume raw? - ready made white icing

I have a cake for my friends and I made Royal Icing http://www.cooks.com/rec/view/0, 166.1521 ...

(no load)

But the important question of ice is safe to eat? The protein is mixed with sugar and the meringue is ready for use.

The proteins are completely safe for human consumption in this way?