You have to imagine it like this: Everyone who touches that handle has touched many other things which have different types of bacteria. There would just be one type of bacteria on that handle.
It would be impossible to tell which types of bacteria were on there, unless investigated.
No, germs cannot be seen with a UV light. UV light can be used to disinfect surfaces by killing germs, but it does not make germs visible to the human eye. Germs are microscopic organisms that are not visible without the use of a microscope.
Alcohol-free hand sanitizers may not be as effective as alcohol-based ones at killing germs. They may have varying effectiveness against different types of germs, but generally, they are less effective at reducing the microbial load on hands compared to alcohol-based sanitizers.
The number of germs needed to make you sick can vary depending on the type of germ, your immune system, and other factors. Typically, it only takes a small amount of certain harmful germs to cause an infection or illness. Practicing good hygiene, such as washing your hands regularly, can help reduce your risk of getting sick from germs.
Soap is generally more effective at removing dirt, grime, and germs from hands than hand sanitizer like Germ-X. Soap works by physically breaking down and washing away germs, while hand sanitizer kills germs on contact. Both can be effective, but soap is preferred when hands are visibly dirty.
Boiling water for at least one minute is an effective way to kill most germs and make water safe for drinking. Alternatively, using water purification tablets or a water filter can also remove harmful germs and make water safe to consume.
More germs are in the hair than hands!
From dirty things, direct contact(from other people) and others.
A person has more germs in their mouth than on their hands. Saliva has enzymes that prevent germs from forming, while your hands touch things such as doorknobs all day which are infested with germs.
The germs on your hands will spread to every surface you touch. So the door handle in the bathroom will be full of germs. Any one who touches it after that will take some of the germs with them. everything they touch will also leave some germs behind. Also if you touch someone else you will pass germs to them as well.
Billions.
by not washing hands ?
The life span of germs on hands can vary depending on the type of germ and the conditions present. Generally, some germs can survive on hands for a few hours up to a few days. Regular handwashing with soap and water is important to reduce the transmission of germs.
No
I almost think you are kidding. Everything you touch, all day, every day, puts germs on your hands.
Germs are of course harmful all of them are harmful! Harmful germs make people sick and cause rare diseases like blood diseases and like swine flu. Remember that germs right now are in your hands and wash them with soap and water before eating, after eating, and after going to the bathroom, since germs are also living things they can be harmful.Also germs spread when after playing in dirt you dont wash hands and touch the door of the house or school some germs spread from your hands to their hands and then they spread when someone else touches the door: go to Google, type germs and see images of those things in hands! Dont get away!
Soap kills 79% of germs off of your hands.
Wash your hands!