From 2015, and during a time when we’re far better informed than back in the early 1900s...
https://www.cambridge.org/core/journals/infection-control-and-hospital-epidemiology/article/contaminated-syringes-reused-during-employee-vaccination-programs/D1685E3332E419AE1098914DFC057831
For anyone interested...
https://www.worthpoint.com/worthopedia/wwi-army-medical-field-surgical-instrument