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How war weakens national immune systems

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Conflict weakens national immune systems, leading to catastrophic public health emergencies. People lose access to shelter, food, clean water, sanitation and healthcare, making them far more susceptible to deadly diseases.  Doctors Without Borders show how outbreaks of infections can devastate already war-torn communities.

After the first World War ended in 1918, the Spanish Flu killed how many people worldwide?

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