Microbiology In a patient with a vesicle on shin. Microscopy on Tzank smear showed giant cells. Causative agents is: A Vaccinia virus B Varicella zoster C Tuberculous D Molluscum contagiosum 💡 Explanation In a patient with a vesicle on shin. Microscopy on Tzank smear showed giant cells. Causative agents is: ✓ Correct Answer: B. Varicella zoster