How should you clean a blood spill in the laboratory?

Using a 1:10 solution of sodium hypochlorite is the correct approach to cleaning a blood spill in the laboratory because it is an effective disinfectant. Sodium hypochlorite, which is commonly found in household bleach, has a concentration that is recognized for its ability to inactivate a wide range of pathogens, including viruses and bacteria that may be present in blood.

This solution should be applied to the spill and allowed to sit for a sufficient amount of time to ensure thorough disinfection before cleaning up the residue. Following proper protocols like this reduces the risk of transmission of infections and maintains a safe working environment.

In contrast, wiping the spill with tissue paper would merely spread the contamination without effectively disinfecting the area. Using bleach wipes, while they may be effective in some contexts, might not provide the same concentration of active ingredient as a diluted solution, and it's essential to ensure that the wipes are also approved for use against bloodborne pathogens. Running water over the spill doesn't disinfect it; instead, it could merely dilute the blood, increasing the risk of splashing and possible exposure to infectious agents.