H—3l
Fig. V—Density and Incidence in Two Epidemics (see Appendix, Table VIII). (N.B. —1947-49 epidemic: positive cases to 31st March, 1949; cases with paralysis or paresis to 31st December, 1949.)
4—H 31
97
H—3l
Fig. V—Density and Incidence in Two Epidemics (see Appendix, Table VIII). (N.B. —1947-49 epidemic: positive cases to 31st March, 1949; cases with paralysis or paresis to 31st December, 1949.)
4—H 31
97
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