Heart disease is not caused by a virus. Unlike malaria, or HIV Aids, or Flu, heart diseases are not infectious (contagious). This means you cannot get it from getting into contact with, or sexual activity, or from the bite of insects or bugs. However, there are many things that can make one develop a heart disease. Factors that cause people to develop heart diseases are called risk factors.
Below are a few: Heavy smoking and drinking. Being obese (overweight). Doing very little or no exercise at all. Old age (even though young people now get heart diseases). High blood pressure.
These factors have different effects on the heart.
Heart disease is not caused by a virus. Unlike malaria, or HIV Aids, or Flu, heart diseases are not infectious (contagious). This means you cannot get it from getting into contact with, or sexual activity, or from the bite of insects or bugs. However, there are many things that can make one develop a heart disease. Factors that cause people to develop heart diseases are called risk factors. 
Heavy smoking and drinking.