Vaccine preventable viral diseases in developing countries

Area of Science:

• Public Health
• Infectious Diseases
• Vaccinology

Background:

• Viral infectious diseases pose significant threats in developing countries.
• Immunization is a key strategy for preventing diseases like poliomyelitis, measles, hepatitis B, and yellow fever.

Purpose of the Study:

• To assess the impact and potential of existing vaccines against major viral infectious diseases in developing countries.
• To highlight the obstacles preventing the complete elimination and eradication of these diseases through vaccination programs.

Main Methods:

• Review of existing vaccine efficacy data for poliomyelitis, measles, hepatitis B, and yellow fever.
• Analysis of disease burden and mortality in developing countries.
• Evaluation of the Expanded Programme on Immunization (EPI) framework.

Main Results:

• Vaccines for polio and measles prevent millions of deaths and cases annually, yet significant numbers still occur.
• Hepatitis B vaccines are highly effective and increasingly affordable, despite causing over 50 million infections and one million deaths yearly.
• Yellow fever vaccination, available since 1937, has not prevented outbreaks, with thousands of cases and deaths reported recently.

Conclusions:

• Systematic vaccination programs, particularly within the EPI, hold theoretical potential for eliminating or eradicating poliomyelitis, measles, and hepatitis B.
• Significant obstacles must be addressed to achieve these ambitious public health goals through immunization.