DOCTORS are perplexed by a disease outbreak in Canada that tests suggest may be caused by the SARS virus, but whose symptoms are not nearly as nasty. Investigators do not know if it is the same virus, a mutated version or a hitherto unknown relative of the disease that has killed more than 800 people worldwide.
Seven people died at a retirement home near Vancouver after a respiratory illness began spreading among residents early in July, affecting 97 of the 142 residents and 46 of the 160 staff. When tests for flu came back negative, samples were sent to Canada’s…
