Smallpox doesn't strike the House of Hapsburg in 1767?

In 1767 the Imperial family were struck by smallpox which resulted in the deaths of the Empress Josepha, the Archduchess Maria Josepha (who was about to make her way to Naples to marry Ferdinand IV ) and Maria Elizabeth, the famed beauty of the family was badly scarred. If this did not all occur and the surviving Maria Josepha made it to Naples, what are the marital prospects for the remaining daughters of Maria Theresa in this scenario?
 
In 1767 the Imperial family were struck by smallpox which resulted in the deaths of the Empress Josepha, the Archduchess Maria Josepha (who was about to make her way to Naples to marry Ferdinand IV ) and Maria Elizabeth, the famed beauty of the family was badly scarred. If this did not all occur and the surviving Maria Josepha made it to Naples, what are the marital prospects for the remaining daughters of Maria Theresa in this scenario?

Elisabeth probably winds up in Paris as Louis XV's second wife or in Savoy wed to the duke of Chablais if that fails.
Maria Josefa gets married to Fernando of Naples
Maria Carolina to the duke of Parma
Maria Antonia to the dauphin

Not sure where Maria Amalie winds up though. Her mother won't let her maarry Karl of Zweibrücken, but there aren't really other options. Her sister's made a Saxon match already, so I don't think Maria Theresia will wed Amalie to the elector. I suppose if Elisabeth ends up as queen of France, then Amalie might wind up as duchess of Chablais. Otherwise its slim pickings - Carlos III didn't want her [Amalie] fearing she'd dominate his son, so maybe Amalie takes Elisabeth's OTL place at Klagenfurt. I don't think she'll be happy about it though.
 
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