SARS Learning Curve: A Chinese pathologist says that SARS may be transmited through sweat and other bodily fluids:

He first noticed during last spring's outbreak that people can be infected by SARS even if they wear protective masks.

'There must be other virus transmission channels,' he told China Daily.

Antibody and gene tests helped prove his hypothesis.

'SARS virus were detected in urinary, excretory and digestive organs of four patients, who were among the early victims of the diseases last spring,' he said.

If true, that would help explain why healthcare workers were disproportionately affected despite taking respiratory precautions. They would have had to bathe and clean patients infected with the virus and would have come into contact with a variety of bodily fluids. Even moreso than household contacts would have.