Social & Preventive Medicine General d02e9b89 Shortest incubation period is seen in- A Influenza B Hepatitis B C Hepatitis A D Rubella High-Yield Explanation Mumps → 16 - 18 days Influenza → 2 - 3 days Hepatitis A → 15 - 90 days Hepatitis B → 6 wk to 6 months