Act Three Quote

"A plague o’ both your houses!" - Mercutio (3.1.90)
Mercutio's pain both physical and emotional, was expressed in these lines after being stabbed by Tybalt. He curses both the Montague and Capulet houses for causing his death becasue if the two families were to never have been enemies, then there would have been no brawl and Mercutio would have lived. Because of this, Mercutio is so overwhelmed in anger that he wishes a plague on the two houses. Romeo then avenges the death of his friend by killing Tybalt. Could this be the start of the plague brought on by Mercutio?