WEEKS.
32
30
28
26.
24
22
20
Percentage of
18
Infected
16
Rats on Total
14
caught.
12
10
8
6
4
28
26
21
22
20
18
16
Number of
14
Plague Cases.
12
10
8
6
4
Weeks.
Curves of Rat and Human Plague.-July 31st, 1903, to August 4th, 1904.
1903.
HEALTH DISTRICT I.
1904.
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سلى
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