If you do nothing to prevent the disease from spreading, it will surely increase. Also, introducing it to a new area by being a carrier is another way.
Handwashing is the best way to reduce the spread of infectious disease.
Because Parkinson's disease is mental, it is definitely not infectious, as there is nothing that can be done to spread it. However, it can be spread genetically.
Anyone who is infected......
Infectious diseases spread when bacteria or viruses move from the carrier to others.
Tularemia is an infectious disease starting with "tu-". It's often spread by rabbits.
noncommunicable cannot be spread from one person to another noninfectious cannot be spread from person to person
Hepatitis A is an infectious viral disease. It is spread via the fecal-oral route.
An "infectious disease" an agent that can be passed from one living organism to another. A non-infectious disease is a disease or other condition that cannot be spread to another organism.
colds, and infectious diseases
The disease which is spread from person to person is called infectious disease. For example flu is a viral disease through which the other person is infected from the patient
Infectious disease that are spread through sexual contact are called, "STDs" which is short for "Sexually Transmitted Disease". The former term used was, "VD" which stood for "Venereal Disease".
HIV is an infectious disease. It is not spread through genetics.