Notes

To cause disease, the bacteria must invade the cells of a living organism. Most bacteria will not invade another living organism, and many more bacteria are rendered harmless by our immune systems, while others, such as gut bacteria, are beneficial.

In many developing countries, poor hygiene, limited access to clean water and poor (or no) sewage treatment leads to huge numbers of deaths from bacterial infections such as those that cause dysentery.

Waterless hand sanitizer provides several advantages over hand washing with soap and water. However, they are not effective if organic matter (dirt, food, or other material) is visible on hands.
Benefits of waterless hand sanitizer:
require less time than hand washing
act quickly to kill microorganisms on hands
are more accessible than sinks
reduce bacterial counts on hands
do not promote antimicrobial resistance
are less irritating to skin than soap and water
some can even improve condition of skin