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Table 1 Month wise distribution of clinically diagnosed and serologically positive cases amongst primary and secondary cases during the DF outbreak, 2003

From: Eco-epidemiological analysis of dengue infection during an outbreak of dengue fever, India

Month Total Suspected cases Serologically Positive cases (%) Primary infection (IgM Positivity) Secondary infection (IgM+ IgG Positivity) Suspected secondary infection (IgG Positivity)
August 12 3 (0.34%) 1 (0.5%) 1 (0.26%) 1 (0.32%)
September 157 68 (7.6%) 17 (8.6%) 24 (6.3%) 27 (8.6%)
October 982 583 (65.3%) 126 (63.3%) 246 (64.57%) 211 (67.4%)
November 362 230 (25.76%) 49 (24.6%) 110 (28.87%) 71 (22.68%)
December 37 9 (1%) 6 (3%) 0 (0%) 3 (1%)
Total 1550 893 (57.36%) 199 (22.28%) 381 (42.67%) 313 (35.05%)