Vector control measures target the Anopheles mosquitoes that transmit malaria, thereby reducing the spread of the disease. These measures include the use of insecticide-treated bed nets, which protect people from mosquito bites during sleep, and indoor residual spraying with insecticides, which reduces the lifespan of mosquitoes and their capacity to transmit malaria. Eliminating standing water and ensuring proper drainage prevent mosquito breeding. The use of larvicides in water bodies can also control mosquito larvae. These measures, when implemented effectively, can significantly decrease the mosquito population, thus reducing the incidence of malaria.

Some populations are more at risk of cholera transmission primarily due to factors related to water and sanitation infrastructure. Populations living in areas with inadequate access to clean drinking water, poor sewage disposal systems, and insufficient hygiene practices are at a higher risk. These conditions facilitate the contamination of water sources with Vibrio cholerae. Overcrowding, especially in refugee camps or urban slums, exacerbates these risks, as does the lack of public health infrastructure to manage and treat water supplies effectively. Additionally, populations in areas hit by natural disasters like floods or earthquakes are vulnerable due to the disruption of regular water and sanitation services.

The rapid spread of airborne diseases like tuberculosis in urban areas is influenced by several factors. High population density leads to crowded living and working conditions, where people are in close proximity for extended periods, facilitating the spread of TB. Poor ventilation in residential and public buildings allows TB bacteria to remain in the air for longer periods, increasing the likelihood of inhalation by healthy individuals. Additionally, urban areas often have higher rates of poverty and inadequate healthcare infrastructure, contributing to delayed diagnosis and treatment of TB. These factors combined with the mobility and interaction patterns in urban environments create conditions conducive to the rapid spread of tuberculosis.

The transmission of HIV from mother to child can occur during childbirth and breastfeeding, but the mechanisms differ. During childbirth, the baby is exposed to HIV in the mother's blood and vaginal fluids, which can result in transmission. The risk is higher during a prolonged and complicated delivery. In contrast, during breastfeeding, the virus is transmitted through breast milk. The risk of transmission through breastfeeding accumulates over time; hence, longer periods of breastfeeding correlate with a higher risk. Preventive strategies, such as antiretroviral therapy for the mother and choosing alternatives to breastfeeding, can significantly reduce transmission risks.

People with latent TB infection (LTBI) cannot transmit tuberculosis to others. LTBI occurs when an individual has been infected with Mycobacterium tuberculosis but the bacteria remain inactive in the body, causing no symptoms and not being contagious. This state can persist for years without progressing to active TB disease. However, LTBI poses a risk as it can potentially activate and develop into infectious TB, particularly in individuals with weakened immune systems. Regular health check-ups and treatment, if recommended, are crucial for individuals with LTBI to prevent the activation of the disease.