Among bloodborne pathogens relevant to dental occupational exposure, which carries the highest risk of transmission per a single needlestick exposure incident?

Hepatitis B carries a notably higher risk of transmission per needlestick/occupational exposure incident compared to HIV or Hepatitis C, due to its higher viral load and infectivity (estimated risk roughly 6-30% for HBV, versus approximately 1.8% for HCV and approximately 0.3% for HIV) — a major reason Hepatitis B vaccination is specifically emphasized and required to be offered to healthcare workers under OSHA's Bloodborne Pathogens Standard.