3. where was the spanish flu thought to have started? how was it thought to have spread? 4. what environmental factors contributed to the spanish flu and its spread? 5. what was the toll of the spanish flu? what effects did it have? 6. what did the spanish flu have in common with h5n1? what is different? 7. how are scientists today using information from the spanish flu? what did they discover? 8. what did the study of the virus tell scientists about the possible start and spread of the disease? 9. why is it important for health scientists to study the spanish flu of 1918? 10. what can we learn from the spanish flu to prevent or reduce another pandemic? what dangers still exist? h5n