Question

what is the most effective means in preventing the spread of germs?
wearing a mask
wearing a gown
washing hands briskly with soap and water or an alcohol - based agent
wearing gloves for all procedures

Explanation:

Proper hand - hygiene, such as washing hands briskly with soap and water or an alcohol - based agent, can remove a large number of germs from the hands which are a common source of germ spread. Masks, gowns, and gloves have their uses but are not as universally effective as hand - washing for general germ prevention.

Answer:

Washing hands briskly with soap and water or an alcohol - based agent