As of now, that's all I can see that can be done.
Besides getting a respirator for the house! The virus itself is untreatable. Completely.
Zinc might help too. It seems to make the bugs less robust and also seems to keep infections from starting.
Treatment March 25, 2003, 12:00 PM EST Because the etiology of these illnesses has not yet been determined, no specific treatment recommendations can be made at this time. Empiric therapy should include coverage for organisms associated with any community-acquired pneumonia of unclear etiology, including agents with activity against both typical and atypical respiratory pathogens (2). Treatment choices may be influenced by severity of the illness. Infectious disease consultation is recommended. Clinicians evaluating suspected cases should use standard precautions (e.g., hand hygiene) together with airborne (e.g., N-95 respirator) and contact (e.g., gowns and gloves) precautions (see the Updated Interim Domestic Infection Control Guidance in the Health Care and Community Setting for Patients with Suspected SARS). Until the mode of transmission has been defined more precisely, eye protection also should be worn for all patient contact. As more clinical and epidemiologic information becomes available, interim recommendations will be updated.
In other words, support the person and hope they don't die!
An Israeli virologist has a compound made up of elderberries, which has been proved to be another anti-viral, called Sambucol. I have seen FReepers' comments about Sambucol, that it is terrific in stomping out a cold or flu. I got two bottles on sale lately, and intend to use them if something like this breaks out.
Other than that, I will pray.