Spanish flu

Definition

Spanish flu, caused by the H1N1 influenza A virus, was a pandemic that occurred in 1918-1919. It disproportionately affected young adults and led to severe respiratory complications.

5 Must Know Facts For Your Next Test

1. The Spanish flu resulted in an estimated 50 million deaths worldwide.
2. It is believed to have originated from an avian source, crossing over to humans.
3. Unlike typical seasonal flu, the Spanish flu had a high mortality rate among healthy young adults aged 20-40.
4. Symptoms included high fever, severe pneumonia, and acute respiratory distress.
5. The pandemic spread rapidly due to global troop movements during World War I.

Review Questions

• What age group was most affected by the Spanish flu?
• What were the primary symptoms associated with the Spanish flu?
• How did World War I contribute to the rapid spread of the Spanish flu?

Related terms

Influenza A virus: A subtype of influenza viruses responsible for various pandemics including H1N1.

Pneumonia: An inflammatory condition of the lung affecting primarily the alveoli, often seen as a complication in viral infections.

Acute Respiratory Distress Syndrome (ARDS): A severe lung condition causing widespread inflammation and fluid accumulation in the lungs.