Table 4. Comparison of basic reproduction numbers (R0) for SARS in some affected areas in literature computed by using Richards model and T = 8.4*.

Affected area	Reference	Growth rate	R 0
Singapore	9	0.12	2.7
Hong Kong	9	0.09	2.1
Taiwan	7	0.136	3.08
Toronto (phase I)	This article	0.146	3.41

*SARS, severe acute respiratory syndrome.