How so?
Reseachers indicate that WARMER WEATHER represents the increased threat involving SARS ...
From: http://image.thelancet.com/extras/03art4453web.pdf
Finally the warm season has begun in Hong Kong, with daily temperatures now at 25–30ºC. The seasonal risks of dengue and influenza will increase, and if serious outbreaks occur, they will complicate the triage of patients with possible symptoms of SARS. Thus, measures that can be taken now to limit further transmission, such as the shortening of the onset-to-admission interval, should be given high priority.