Final answer:
The number of Italians injured after WW1 is not specified, but it can be inferred that a significant number were injured based on the large number of casualties mentioned in the provided information.
Step-by-step explanation:
The number of Italians injured after World War I was not mentioned in the provided information. However, it is stated that more than 8.5 million soldiers died in the war, and twenty-one million were wounded. The numbers of civilians who perished or were wounded were also in the millions. Therefore, it can be inferred that a significant number of Italians were injured after WW1.