Fig. 2: Number of patient visits per day to the Hospital for Sick Children (HSC) emergency department from Jan. 1 to Dec. 31, 2003 (SARS year), compared with number of visits in 2000–2002 (non-SARS years). Period 1 (Feb. 15 to Mar. 26) = only a few cases of SARS in GTA and relatively little public awareness. Period 2 (Mar. 27 to May 4) = strictest city-wide infection control measures in place and peak of SARS cases to initial containment of SARS on May 4. Period 3 (May 5 to June 12) = initial containment of SARS and second, smaller SARS cluster, which occurred during last 3 weeks of this period. Period 4 (June 13 to Sept. 15) = still active SARS cases but no new SARS cases, and continued SARS screening at HSC. Period 5 (Sept. 16 to Dec. 31) = no SARS cases in GTA.