I'm not sure about deodorant, but disinfectants literally do as the name says, the disinfect the area stopping germs and bacteria spreading, preventing diseases and infections. Antiseptics remove and kill bacteria and if the bacteria can not be spread then nor can the disease.
they prevent diseases very well but it is very hard to completely cure a disease so most vaccines strongly prevent diseases but there are always cases where the disease will break through.
Epidemologist
It was Semmelweis who first introduces antiseptics to prevent disease. The first sterlization ( not complete) was given by Pasteur, known as pasteurization.
Vaccination will prevent or lower the risk of certain diseases
Wearing sunglasses may lower the risk of cataracts.
Disinfectants help to kill or deactivate bacteria, viruses, and other microorganisms on surfaces. They are used to prevent the spread of infections and diseases in homes, healthcare settings, and other environments.
Joseph Lister
Antiseptics kill bacteria in bacterial infections. They also prevent any other germs from entering the site of the infection such as in a cut.
Antiseptics, such as alcohol, don't actually kill bacteria but usually prevent them from growing/reproducing. They change the environment and reduce the "food" supply. Other antiseptics can destroy bacteria by attacking their cell membrane.
From my understanding, it's not deodorants, but rather antiperspirants because they prevent the body from sweating which is one way you cool down. I don't know the specifics of it. Sorry.
One of them was Carbolic aid made by Joseph Lister
Chemicals in medical applications can include pharmaceutical drugs, such as antibiotics, painkillers, and chemotherapy agents, that are used for treating various diseases and conditions in patients. Other chemicals used in medical applications can include disinfectants and antiseptics, which are used to clean and sterilize medical equipment, surfaces, and wounds to prevent infections. Additionally, chemicals like contrast agents are used in medical imaging techniques, such as CT scans and MRI scans, to enhance the visibility of certain tissues and structures within the body.
By helping to prevent diseases such as Diabetes and osteoporosis.e...
Scurvey
What are the ailments and diseases you can get from cat
Wash you hands
Scurvy.