Household Transmission of Pandemic (H1N1) 2009, San Antonio, Texas, USA, April–May 2009
Appendix Figure. Interval between onset of illness for index and secondary case-patients (N = 32), Region 8, Texas, April-May 2009. Bars indicate number of case-patients who had acute respiratory infection (red bar sections), influenza-like illness (white bar sections), or laboratory-confirmed pandemic (H1N1) 2009 (black bar sections). Influenza-like illness, fever (measured or subjective), and cough or sore throat; acute respiratory infection, fever or cough or sore throat or rhinitis.