Zinc lozenges, L-Lysine, and Vitamin C are common homeopathic solutions for warding off viruses.

Avoid contact as much as possible. Frequent hand washing, showering, and the use of hand sanitizer for both you and your spouse. Keep tissues close by and dispose of them immediately into a plastic bag. No sharing drinks, food, etc. and keep her out of the kitchen. If you have two bathrooms, try not to use the same one as your spouse. Wiping down door knobs, faucet controls, light switches, etc with an antimicrobial wipe on a regular basis will help. Keep yourself healthy with good nutrition, hydration and plenty of sleep. Your immune system is your best defense, don't let it get run down.