2. Viruses
Viruses are pathogens capable of genetic mutations and lack a cell structure. They enter the human body's cells and use their machinery to respond and spread. Some of the lethal viruses that top the list of communicable disease are:
Influenza: This type of virus attacks the respiratory system in the human body and has some prominent symptoms such as
- Fatigue
- Fever
- Sore throat
- Muscle and body cramps
- Continued cough and runny rose
- Formation of mucus in lungs and air pipe
- Breathing issues
The influenza virus affects people when they contact people with the same influenza virus.
Rhinovirus: People infected with rhinovirus are caught with the common cold and experience generic symptoms like sore throat, headache and stuffy nose. However, this group of viruses is infectious as it can be spread by inhaling infected droplets in the air from the cough or sneeze of different individuals.
HIV (Human Immunodeficiency Virus): This deadly virus destroys the natural ability of the body to fight infections that are generally transmitted through infected blood and other bodily fluids. Some of the chronic symptoms of HIV are as follows:
- Swollen lymph nodes
- Fever and chills
- Mouth sores
- Body and muscle cramps
- Rash
The primary step of diagnosing this type of infectious disease involves conducting HIV tests. As per doctors, there is no permanent solution to HIV; however, certain medications have proved to control the virus. Therefore, people searching for "what are communicable diseases” come to know about HIV/AIDs as these infectious diseases are more deadly than the rest.