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Table 1 Index oseltamivir start day and HH size vs. secondary attack

From: Oseltamivir for treatment and prevention of pandemic influenza A/H1N1 virus infection in households, Milwaukee, 2009

Day of index oseltamivir (onset = 0) Total number of households Secondary attack Percent
0 8 1 12.5%
1 21 4 19.0%
2 11 3 27.3%
3+ 51 19 37.3%
Never 44 10 22.7%
HH size    
2-3 48 7 14.6%
4 41 14 34.1%
5+ 46 16 34.8%