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Infectious Disease
Infectious Disease Treatment in Whitefield
How common are infectious diseases?
Infectious diseases are extremely common worldwide. Some infectious diseases strike more often than others. For instance, in the United States, 1 out of every 5 people is infected with the influenza (flu) virus each year.
What are the symptoms of infectious diseases?
Symptoms of infectious disease are particular to the type of disease. For example, symptoms of influenza include:
- Fever
- Chills
- Congestion
- Fatigue
- Muscle aches and headache
Other infectious diseases, such as Shigella, cause more serious symptoms, including:
- Bloody diarrhea
- Vomiting
- Fever
- Dehydration (lack of fluid)
- Shock
What causes infectious diseases?
Infectious diseases in humans are caused by microorganisms including:
- Viruses that invade and multiply inside healthy cells
- Bacteria, or small, single-celled organisms capable of causing disease
- Fungi, which include many different kinds of fungus
- Parasites, which are organisms that live inside host bodies causing sickness
Infectious diseases spread in multiple ways. In many cases, direct contact with a sick individual, either by skin-to-skin contact (including sexual contact) or by touching something another person touches, transmits the disease into a new host. Contact with body fluids, such as blood and saliva, also spreads infectious diseases.
Some diseases spread through droplets discharged from a sick person’s body when they cough or sneeze. These droplets linger in the air for a short period of time, landing on a healthy person’s skin or inhaled into their lungs.
In some cases, infectious diseases travel through the air for long periods of time in small particles. Healthy people inhale these particles and later become sick. Only certain diseases spread with airborne transmission, including tuberculosis and the rubella virus.
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