Ensuring Health Services Meet Minimum Standards During Disasters

When disasters strike-whether earthquakes, floods, armed conflicts, or disease outbreaks-health systems often face their greatest tests. Displaced populations crowd into temporary shelters, sanitation breaks down, and access to routine healthcare becomes severely limited. In these chaotic environments, maintaining minimum standards for health services isn’t just a bureaucratic requirement; it’s the difference between life and death for the most vulnerable, particularly children. Understanding what constitutes adequate health response during emergencies helps communities, aid workers, and governments prepare more effectively and save more lives.

Why measles control and vaccination are urgent priorities 🔗

Among all the health threats that emerge during disasters, measles stands out as one of the most dangerous and easily preventable. According to the World Health Organization, measles is one of the world’s most contagious diseases-a single infected person can transmit the virus to nine out of ten unvaccinated close contacts. The virus remains active in the air or on surfaces for up to two hours, making crowded emergency shelters and refugee camps particularly high-risk environments.

The consequences of failing to control measles during emergencies are severe. In 2023 alone, an estimated 107,500 people died from measles globally, mostly children under five years of age. These deaths are particularly tragic because they are entirely preventable through vaccination that costs less than one dollar per child.

Implementing emergency vaccination campaigns 🔗

The Sphere Humanitarian Standards and WHO-UNICEF joint guidelines recommend swift preventive mass vaccination campaigns during the acute phase of any emergency. These campaigns should target children from six months through 14 years of age, along with vitamin A supplementation. At minimum, children between six months and four years must be immunized, as this age group faces the highest mortality risk.

Several factors make emergency vaccination campaigns successful. First, vaccination must begin as quickly as possible-preferably within days of the emergency onset. Second, coverage rates must reach at least 95% to achieve herd immunity and prevent outbreaks. Third, campaigns must be accompanied by vitamin A supplementation, which can reduce measles mortality by up to 50% by addressing the deficiency that commonly worsens during emergencies.

Experience from past disasters demonstrates the effectiveness of rapid vaccination. Following the 2004 Indian Ocean tsunami, non-selective preventive vaccination in Tamil Nadu, India, began just four days after the disaster and achieved coverage rates exceeding 95%, successfully preventing a measles outbreak despite the massive displacement of populations.

Special challenges for refugee populations 🔗

Refugee camps and informal settlements present unique challenges for measles control. Damaged health infrastructure, interrupted routine immunization, and overcrowded living conditions create a perfect storm for disease transmission. The Pan American Health Organization emphasizes that refugees should be vaccinated as soon as possible upon arrival, regardless of their stated vaccination history, because documentation is often lost during displacement and immunity cannot be assumed.

Malnourished children face particularly high risks. Measles weakens the immune system and can make the body less able to protect itself against other infections, creating a dangerous spiral of declining health. Children with vitamin A deficiency or compromised immunity from HIV or severe malnutrition experience the highest complication and death rates.

Disease monitoring and outbreak response systems 🔗

Effective health services during emergencies depend on robust systems for detecting and responding to disease outbreaks. When routine public health surveillance breaks down-as it often does during disasters-early warning systems become critical for identifying threats before they escalate into epidemics.

Establishing early warning alert networks 🔗

The Early Warning Alert and Response Network (EWARN), developed by WHO with support from the US Centers for Disease Control and Prevention, provides a framework for rapid disease detection during humanitarian crises. These systems focus on epidemic-prone diseases including cholera, measles, meningitis, and acute respiratory infections.

Implementing EWARN requires several key components. Health facilities in affected areas must be identified as reporting sites. Diseases under surveillance and thresholds for triggering public health action must be clearly defined. Surveillance staff need training, and community education programs must encourage early reporting of suspected cases. The system should begin operating as soon as possible after the acute phase of an emergency stabilizes.

Steps in outbreak investigation 🔗

When disease clusters are detected, systematic investigation protocols guide the response. The WHO Outbreak Toolkit outlines a staged approach: confirming that an unusual increase in cases exists beyond normal baseline, verifying diagnoses through laboratory confirmation, implementing immediate control measures, and developing case definitions to identify affected individuals.

Investigation continues with active case finding through medical records, interviews, and fieldwork. Epidemiologists create epidemic curves showing the time distribution of cases, map geographic patterns, and analyze demographic characteristics. This descriptive analysis helps identify high-risk groups, guides resource allocation, and informs decisions about which populations to target for vaccination or other interventions.

Notification and coordination requirements 🔗

Under the International Health Regulations, certain outbreaks may constitute Public Health Emergencies of International Concern and require notification to WHO through national focal points. Even when international notification isn’t required, all outbreaks should be reported through local, regional, and national health authorities to ensure coordinated response and resource mobilization.

Effective outbreak response requires rapid coordination among multiple stakeholders. District-level Outbreak Coordination Committees, typically chaired by government officials and including all potential partners such as NGOs working in affected areas, should be established before outbreaks occur. Having these structures in place accelerates response when emergencies strike.

Primary health care in emergencies 🔗

Primary health care (PHC) forms the foundation of effective emergency health response. Rather than relying solely on hospitals and specialized facilities-which may be damaged, overwhelmed, or inaccessible-emergency health systems must extend community-level care to populations where they are.

Adapting PHC principles to crisis settings 🔗

The integration of disaster management within primary health care enables provision of optimal, low-cost emergency medical assistance by utilizing existing networks of community health workers, clinics, and local health infrastructure. Research shows that when primary healthcare services remain accessible during disasters, both mortality and morbidity rates decrease significantly.

Emergency PHC includes several essential components. Preventive services such as vaccination, nutritional support, and health education address root causes of illness. Curative services for common conditions-respiratory infections, diarrheal diseases, wound care-treat the health problems that become more prevalent during emergencies. Maternal and child health services protect the most vulnerable populations. Mental health and psychosocial support address the trauma that accompanies disasters.

Community-level interventions 🔗

The International Federation of Red Cross and Red Crescent Societies emphasizes that community-based health interventions are essential for effective emergency response. These include community-based surveillance to detect and report disease outbreaks, community case management of malnutrition and common illnesses, safe burial practices, and psychosocial support delivered through local volunteers.

Community health workers serve as bridges between affected populations and formal health systems. They can provide health education, distribute basic supplies, identify individuals needing referral to higher-level care, and gather surveillance information. Their local knowledge and community trust make them invaluable during chaotic emergency conditions.

Building health system resilience 🔗

The WHO Health Emergency and Disaster Risk Management framework, published in 2019, emphasizes that effective disaster management requires a whole-of-health-system approach where every level-from community health workers to tertiary hospitals-participates in all phases of the disaster cycle. This includes preparedness planning, stockpiling essential supplies, training personnel, conducting drills, and establishing coordination mechanisms before emergencies occur.

Preparedness investments pay dividends when disasters strike. Health facilities that have developed continuity of operations plans, established backup communication systems, and trained staff in emergency protocols can maintain services when other systems fail. The goal is ensuring that health facilities remain functional even during disasters, protecting both regular patients and those with emergency-related health needs.

Meeting minimum standards for health services during disasters requires advance preparation, rapid mobilization, and sustained commitment. Measles vaccination must begin within days of an emergency and reach nearly all children. Disease surveillance systems must detect outbreaks early and trigger rapid response. Primary healthcare must extend to community level and adapt to crisis conditions. When these standards are met, lives are saved and suffering is reduced.

What do you think? How can local communities better prepare their health systems before disasters strike? What role should community volunteers play in maintaining health services when formal systems are overwhelmed?

References

1. https://www.who.int/news-room/fact-sheets/detail/measles
2. https://spherestandards.org/handbook/
3. https://www.paho.org/en/news/3-3-2025-measles-outbreaks-americas-paho-calls-strengthened-vaccination-and-surveillance
4. https://wwwnc.cdc.gov/eid/article/23/13/17-0446_article
5. https://www.who.int/emergencies/outbreak-toolkit/investigating-outbreak-of-unknown-disease
6. https://pmc.ncbi.nlm.nih.gov/articles/PMC5768434/
7. https://www.ifrc.org/our-work/health-and-care/emergency-health