When cleaning blood spills, what is the minimum concentration of bleach recommended for effective disinfection?

The minimum concentration of bleach recommended for effective disinfection of blood spills is a 1:10 solution. This concentration is effective because it provides a strong enough concentration of sodium hypochlorite to inactivate a wide variety of pathogens, including viruses and bacteria, which may be present in blood. Using a 1:10 dilution achieves a balance where the disinfectant is potent enough to target harmful organisms without being overly concentrated, which could potentially harm surfaces or create hazardous fumes.

In situations where biohazard material, such as blood, is involved, it's crucial to employ a disinfectant with adequate efficacy, and the 1:10 bleach solution has been widely accepted in guidelines for infection control and safety protocols.