Not likely. Obviously eating raw eggs always carries a bit of risk. However, whiskey sours with eggs whites contain so little egg. (And mix it with such comparatively large quantities of alcohol.) It is very unlikely you will get sick from the tiny bit of egg in a whiskey sour alone. But it is always good to exercise caution when eating raw eggs. If you feel you are at high risk or you notice the bar is not using chilled eggs, best to avoid.