A communicable disease is caused by a bacteria, fungus, virus or other "germ" that remains active in the air or on surfaces. Some diseases are passed only by direct contact and are referred to as infectious as they are harder to pass to another person.
There any number of communicable diseases ranging from colds to AIDs. These are any disease that can be passed from one person to another. Something has to carry the disease causing microbe. The microbe or virus could be in a sneeze or in the blood.
Diseases that can be transmitted from one organism to another
Hippocrates looked for natural causes to diseases in Ancient Greece
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Genes that are inherited from your parents cause inherited diseases.
Diseases are often caused by viruses and bacteria or genetic factors.
it causes other diseases
infectious and vector diseases and natural causes.
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cardiovascular diseases, cancers, pulmonary diseases, cirrhosis, infectious diseases
Cardiovascular diseases Infective diseases Respiratory Diseases Cancer Injuries