Welcome Fabricfive!
This topic has come up a few times in the forum; below is a link to one of the discussions.
http://www.realbakingwithrose.com/index_ee.php/forums/viewthread/1752/P0/
I had the same concerns when I was asked to make a cake for my pregnant niece, one that would also be eaten by a chemotherapy patient. I chose to play it safe and used pasteurized egg whites to make Rose’s white chocolate mousseline buttercream. The buttercream turned out beautifully and I’ve used them several times since then when I’ve not been certain who might be eating the cake.
