What is a disease? How can they be majorly classified? Given examples.
Answers
Answer:
Types of Diseases
Diseases can be of two types
Infectious diseases
Non-infectious diseases
Infectious Diseases
Diseases that spread from one person to another are called communicable diseases. They are usually caused by microorganisms called pathogens (fungi, rickettsia, bacteria, viruses, protozoans, worms). When an infected person discharges bodily fluids, pathogens may exit the host and infected a new person (sneezing, coughing etc). Examples include Cholera, chickenpox, malaria etc.
Non-infectious Diseases
These diseases are caused by pathogens, but other factors such as age, nutritional deficiency, gender of an individual, and lifestyle also influence the disease. Examples include hypertension, diabetes, and cancer. They do not spread to others and they restrain within a person who has contracted them. Alzheimers, asthma, cataract and heart diseases are other non-infectious diseases.
Read more: Infectious diseases
Based on these above classifications, a disease may fall into any number of these classifications.
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