After that Alex Sandro and Cuadrado both tested positive for Covid-19, which have at some moment put Milan vs Juventus game at risk of a possible postponement, Corriere della Sera revealed the difference that separates today's case from Juventus-Napoli's.
In fact, even that also in Napoli there were only 2 positive cases back then (Zielinski and Elmas), the matter is that both were almost certainly caused by contact with Genoa's players three days earlier, during the league game at San Paolo.
Whereas now in Juventus, none of Sandro or Cuadrado's infections got something to do with the recent Old Lady's games, and there was no evidence of a spread of the virus inside the locker room.