While economic development and infrastructure can influence healthcare access and disease prevention, they are not primary factors in the spread of diseases.

Disease corridors are pathways that facilitate the rapid spread of diseases, often due to factors like trade routes, migration patterns, or transportation networks.

Mountains, with their rugged terrain and limited accessibility, have often acted as natural barriers, hindering the spread of diseases across regions.

Endemic diseases are those that are consistently present in a specific geographic area, often due to factors like climate, local ecology, or cultural practices.

Malaria is primarily transmitted through the bites of infected mosquitoes, while cholera, typhoid fever, and dysentery are waterborne diseases.

Herd immunity refers to the level of immunity in a population that provides indirect protection to individuals who are not immune, reducing the overall spread of the disease.

Malaria is transmitted through the bites of infected mosquitoes, making it a vector-borne disease.

Zoonoses are diseases that can be transmitted from animals to humans, often through direct contact or consumption of contaminated animal products.

Measles has been significantly influenced by human migration patterns, as it is highly contagious and can spread rapidly through unvaccinated populations.

Disease reservoirs are geographic areas where diseases are continuously present, often due to environmental factors or the presence of animal hosts.

Influenza is primarily transmitted through airborne droplets produced by coughing, sneezing, or talking.

A pandemic is a disease outbreak that spreads across a large geographic area, typically affecting multiple countries or continents.

Tetanus is primarily transmitted through contact with contaminated soil or objects, as the bacteria that causes it lives in soil and dust.

Disease surveillance involves the systematic collection, analysis, and interpretation of data on disease occurrence and spread, enabling public health officials to track and respond to outbreaks.

Dengue Fever has been significantly influenced by changes in climate and weather patterns, as the mosquito that transmits the virus thrives in warm and humid conditions.