Epidemiologist is, I believe, the word you were looking for.
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".
A vehicle-borne disease is an infectious disease that is transmitted through a contaminated object or substance, such as food, water, or insects, rather than through direct person-to-person contact. This type of disease can spread quickly through a population if the contaminated vehicle is not identified and controlled.
Through the air.
No. It is not a genetic disease, but an infectious one.
Tuberculosis is a bacterial disease generally spread through the air by coughing or sneezing.
HIV is an infectious disease. It is not spread through genetics.
Mono is an infectious disease that can be spread through bodily fluids. This disease can go into remission and come back.
As an emerging infectious disease, yes, it can. It was bewildering, rapid in movement through the population, misunderstood, and untreatable; just as AIDS was when it first emerged as a threat to public health.
Scurvy is a non-infectious disease caused by a deficiency in vitamin C. It can lead to symptoms such as weakness, anemia, gum disease, and skin problems. Treatment typically involves increasing vitamin C intake through diet or supplements.
Infectious, but it no longer exists. It was eradicated decades ago.
Because it is easily spread from person to person through contact with body fluids.