Eating raw egg whites as long as they are good quality eggs and are pasteurized or fresh eggs and are good eggs is very safe.
The egg whites are very safe to eat and actually provide protein and other good nutritional value to you and can improve your health.
The raw egg whites are also good for and gentle on the digestive system.
Even egg Nog contains raw eggs so eating raw eggs or egg whites that are raw is safe.
You could potentially get sick from raw eggs or raw egg whites if there happens to be bacteria in them but it's a very slim chance that you would get sick.
Most eggs are not infected with any bacteria including Salmonella.