Here is the link for preparing for the flu and infection from the state of Idaho.
Clorox Bleach to Water Ratio For Disinfectant
(NON-FOOD SURFACES)
For cleaning, sanitizing, and disinfecting surfaces such as bathtubs, sinks, faucets, tile, plastic toys, potty chairs, high chairs, changing tables, floors, appliances, countertops, garbage cans, walls, light switches, etc..
Use ½ cup of Clorox® Regular-Bleach per GALLON of water
(This is a ~2500-ppm chlorine mixture using today’s concentrated 8.25% REGULAR bleach)
Pre-wash surface with detergent and water, then apply the sanitizing solution of bleach and water. Allow solution to contact surface for at least 5 minutes for optimum effectiveness. Afterward, rinse and-or air dry.
Bleach to Water Ratio For Disinfectant
(FOOD CONTACT SURFACES)
For cleaning food handling equipment and food contact surfaces such as plastic cutting boards*, stainless cutlery, dishes, glassware, pots and pans, stainless utensils, pet bowls, teething rings,
Use 2 teaspoons of Clorox® Regular-Bleach per GALLON of water
(This is a ~200-ppm chlorine mixture using today’s concentrated 8.25% REGULAR bleach)
Pre-wash surface with detergent and water, then soak with the sanitizing solution of bleach and water. Allow solution to contact surface for at least 2 minutes for optimum effectiveness. Drain and air dry.
*Plastic cutting boards may be sanitized with a stronger solution of 2 Tablespoons bleach per gallon of water (~600-ppm), stand for 2 minutes, rinse.
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NOTE: This is NOT the formula for drinking water purification, but instead it is much stronger for disinfecting surfaces. For drinking water purification, read the following articles:
Make Drinking Water Safe With Bleach
Bleach – Water Ratio For Drinking Water
NOTE: Do not mix Clorox® Regular-Bleach with other household chemicals, since toxic fumes could result.
NOTE: Bleach solutions may discolor fabrics (your clothes, carpets, etc..).
UPDATE: Clorox has been phasing out their old Regular Bleach formula and have introduced “Concentrated Clorox® Regular Bleach”, which is the same Clorox bleach product, just more concentrated. The concentration of sodium hypochlorite has increased from 6% to 8.25%. The formula in this article relates to the current production Concentrated Regular Bleach containing 8.25% sodium hypochlorite (look for the concentration on the label).