伊波拉
What we know (and don't know) about Ebola - Alex Gendler
The Story of Ebola
Ebola Virus: Film reveals scenes of horror in Liberia - BBC News
Ebola - Photos From the Heart of the Struggle | Exposure
霍乱
The Story of Cholera
天花
How we conquered the deadly smallpox virus - Simona Zompi
瘟疫
How Pandemics Spread
蛀牙
What causes cavities? - Mel Rosenberg
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