Why Cold Chains Fail in Emergencies and Who Pays the Price

When disaster strikes, the cold chain is often one of the first lifelines to collapse.

Vaccines lose their effectiveness, blood donations become unusable, and diagnostic samples are compromised. But why do cold chains fail when they are needed most?

The Pressures of Crisis

• Power Outages:
  Natural disasters frequently damage power infrastructure. Cold chain systems depend on uninterrupted electricity, making them vulnerable during blackouts. The World Health Organization (WHO) and World Bank report that over 50% of healthcare facilities in Sub-Saharan Africa lack reliable electricity..
• Transport Disruptions:
  Flooded roads, collapsed bridges, or active conflict zones can delay or block the delivery of temperature-sensitive medical products. According to the Global Competitiveness Index World Economic Forum’s the road quality score in Sub-Saharan Africa dropped from 2.8 in 2018 to 2.4 in 2019, significantly below the global average of 4.07.
• Staff Shortages & Operational Chaos:
  In emergencies, attention shifts to survival. Routine cold chain practices like logging temperatures or rotating PCM packs are often skipped, risking temperature excursions.

The Impact in Numbers

• The WHO Health Emergency Preparedness and Response (HEPR) Report reveals that over 339 million people required humanitarian health services in fragile settings in 2023.
• According to a 2013 Médecins Sans Frontières (MSF) reporttitled "Vaccinating Children Beyond the 'Cold Chain'", 35% of cold boxes used in emergency campaigns experienced unsafe temperature excursions due to heat exposure or delayed transport.
• A 2007 review also estimated that 35% of vaccines in developing countries were exposed to excessive freezingduring storage, rendering them ineffective.

Bottom Line

Cold chains are the invisible guardians of global health. But without resilient systems in place, essential medical supplies are lost—just when vulnerable communities need them most.