Final answer:
Clean water and sanitation have reduced disease transmission, while vaccinations have protected children from infectious diseases, both crucial in increasing child life expectancy in Bangladesh.
Step-by-step explanation:
Two important factors that have contributed to the increase in life expectancy and saving the lives of children in Bangladesh include clean water and sanitation, and vaccinations. The implementation of clean water systems and proper sanitation has significantly reduced the transmission of diseases such as diarrhea and cholera. This, in turn, has had a substantial impact on child mortality. On the other hand, the development and distribution of vaccinations have played a critical role in protecting children from deadly infectious diseases like diphtheria, pertussis, tuberculosis, and tetanus.
Additionally, improvements in healthcare such as the availability of antibiotics and drugs for high blood pressure contribute to overall health and longevity. Education and awareness programs play a supportive role by altering public behaviors positively—encouraging good hygiene, nutrition, and preventing malnutrition related to inadequate water and sanitation. These interventions are particularly effective in low-income countries, where the availability of healthcare professionals is often much lower compared to high-income nations.