Examples of communicable, or infectious, diseases include hepatitis, polio, influenza, HIV/AIDS, malaria, and tuberculosis. These diseases caused by viruses, bacteria, fungi and parasites are capable of spreading among people through the air, blood and other bodily fluids.Know More
Additional examples of communicable diseases include Ebola, cholera and smallpox. While these result in more serious afflictions, even the common cold is an infectious disease. Other popular diseases in this category are MRSA, or methicillin-resistant Staphylococcus aureus, and norovirus, a primary contributor to foodborne illness.
Influenza, which accounts for 36,000 deaths annually, contains many evolving viral strains that have the potential of causing a pandemic. Viral hepatitis, attributable to 1.4 million deaths per year, causes 78 percent of liver cancers and exacerbates the effects of HIV. The HIV virus attacks the immune system and makes people more vulnerable to other types of infections. Today, many people suffering from HIV live for 15 years before reaching the disease's final stage, AIDS.
Tuberculosis and malaria also prove to be indomitable fatal diseases that occur mainly in Africa. Tuberculosis is an airborne bacterial disease, while malaria is a parasitic disease communicated by mosquitoes. Polio is a viral disease that attacks the nervous system, and while it can cause permanent damage to children, it rarely advances fatally.Learn more about Cold & Flu
Common symptoms of influenza type A include a cough, sore throat, headaches, body aches, fatigue, chills, nausea, vomiting, diarrhea and a fever of more than 100 degrees Fahrenheit, according to the U.S. Department of Health & Human Services. Patients should seek immediate medical attention if symptoms include sudden dizziness, frequent vomiting, confusion, seizures, pain in the abdomen or chest, purple or blue lips, shortness of breath or difficulty breathing.Full Answer >
The incubation period for influenza ranges from one to four days, while the average is two days, notes the Centers for Disease Control and Prevention. Most adults have the ability to infect others as early as a full day before presenting symptoms and up to a week after getting sick.Full Answer >
Type A and B influenza are the most common strains and cause seasonal flu and flu pandemics, while Type C influenza is less common because it is not related to the seasonal flu. Type A can occur in humans and animals, while Type B only occurs in humans, says Healthline.Full Answer >
Most human-specific strains of influenza spread from person to person via airborne droplets or from contact with contaminated surfaces, according to the Centers for Disease Control and Prevention. The virus' contagious phase begins a day before symptoms manifest and persists for up to a week after onset.Full Answer >