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This category has the following 3 subcategories, out of 3 total.
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222:20th-century disease outbreaks
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212:Disease outbreaks by decade
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217:1930s health disasters
187:1937 disease outbreaks
174:1936 disease outbreaks
161:1930 disease outbreaks
227:1930s in medicine
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206:Categories
191:(1 P)
178:(1 P)
165:(2 P)
71:1980s
66:1970s
61:1960s
56:1950s
51:1940s
46:1930s
41:1920s
36:1910s
31:1900s
26:1890s
21:1880s
134:25th
129:24th
124:23rd
119:22nd
114:21st
108:20th
102:19th
97:18th
92:17th
87:16th
82:15th
154:0–9
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