There really are cupcakes for every holiday, including Nurses Day, which Sprinkles Cupcakes (various locations) is celebrating with these red velvet and vanilla cupcakes (available in a special box), available May 6th:
Some other similar doctor/nurse-themed cupcakes:
These are by Blue Cupcake via Flickr:
"Part of an order for a pharmaceutical company. These are offered as gift to doctors and each box has a cupcake with the name of the doctor."
Healthcare-themed cupcakes by Petit Cupcakes of London, Ontario via Flickr"
"'Healthcare' themed cupcakes to celebrate the end of a student's nursing practicum!
'Coconut Dream' coconut cupcakes with coconut buttercream, topped with shredded coconut."