In 1866 Austria gave Venetia to France, and France gave it to Italy, so Venetia was again united with the rest of Italy. So, in 1866 Italian unification was advanced by annexing Venetia, an important and rich region.
By this time Lombardy, which long formed a unity with Venetia, was already united with Italy.
What made it self-sufficient was whether it had enough land and serfs which could produce enough food for people to survive on the amount of food that they would produce.
No there is corona virus that is not causing us to be social