Pharmacy Technician Certification Exam Practice Question

Correct Answer: A

Rationale: Varicella vaccine must remain frozen to maintain its efficacy, as exposure to warmer temperatures can compromise its effectiveness. In contrast, pneumococcal, influenza, and meningococcal vaccines are stable at refrigerated temperatures and do not require freezing for transport. Pneumococcal and meningococcal vaccines are stored between 2°C and 8°C, while influenza vaccines can also be kept within this temperature range. Therefore, only the varicella vaccine has specific requirements that necessitate freezing during transportation to ensure it remains effective for immunization.