Answer:
Infectious diseases
Step-by-step explanation:
Infectious diseases are cause by pathogens. These pathogens are micro-organisms(microbes) and can’t be seen by the naked eye except through varying types of microscope. These pathogenic microorganisms are divided into 4 which include Bacteria, Fungi, Virus and Protozoa.
These infectious diseases are high in low-income countries because a low economy is a characteristic of a developing or underdeveloped country. These countries are usually characterized by Poverty, poor education, low health knowledge, poor infrastructure which encourages and supports the prevalence of infectious diseases.