APHA Cold Chain Management & Vaccine Storage 5

Question 1

Which of the following best describes an 'active' cold chain system used in vaccine transport?

Accepted Answer

A system using electrically powered refrigeration units to maintain temperature during transport

Answer

Active cold chain systems use powered refrigeration (e.g., refrigerated vehicles or portable electric coolers) to actively maintain temperature, unlike passive systems that rely on insulation and ice.

Question 2

According to CDC storage guidelines, what is the minimum clearance vaccines should have from the walls, floor, and ceiling of a refrigeration unit?

Accepted Answer

2–3 inches (5–8 cm)

Answer

Vaccines should have 2–3 inches of clearance from walls, floor, and ceiling to allow adequate cold air circulation and prevent temperature extremes.

Question 3

What is the purpose of a Vaccine Vial Monitor (VVM)?

Accepted Answer

To indicate whether a vaccine vial has been exposed to excessive heat over time

Answer

A VVM is a heat-sensitive label on the vial that darkens irreversibly with cumulative heat exposure, indicating the vaccine may no longer be potent.

Question 4

A clinic has a backup generator. During a power outage, what additional step is critical before relying on the generator to maintain vaccine storage?

Accepted Answer

Test the generator monthly and ensure it automatically activates during power loss

Answer

Monthly generator testing and confirmed automatic activation ensures it will function reliably during an actual power outage without manual intervention.

Question 5

When stacking vaccine boxes inside a refrigerator, providers must ensure that:

Accepted Answer

Boxes are arranged to allow cold air to circulate freely between them

Answer

Air must circulate freely around vaccine packaging to maintain uniform temperature; tightly packed boxes create warm pockets that can compromise potency.

(APHA) American Public Health Association Immunization Certification Practice Test

(APHA) American Public Health Association Immunization Certification Practice Test

APHA Cold Chain Management & Vaccine Storage 5