| Scientific title | Survey to estimate the prevalence of biomarkers of infection with hepatitis B virus and hepatitis C virus among children aged 2-5 years and pregnant women in Bangladesh | 
    	
        	| Public title | Survey to estimate the prevalence of biomarkers of infection with hepatitis B virus and hepatitis C virus among children aged 2-5 years and pregnant women in Bangladesh | 
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        	| Background | Burden: The WHO estimated in 2015 that viral hepatitis led to 1.3 million deaths worldwide. Although all hepatotropic viruses have the potential to infect humans and cause acute hepatitis, hepatitis B virus (HBV) and hepatitis C virus (HCV) are the most responsible factors worldwide for death tolls, with more than a 95% rate.
Knowledge gap: This study aims to estimate the prevalence of HBsAg and anti-HCV, along with viral loads of HBV and HCV, in Bangladesh where related studies are limited.
Relevance: This biomarker survey can provide reliable population-based estimates of biomarkers of hepatitis B virus and hepatitis C virus (HBsAg and Anti-HCV), enabling a country status in achieving regional and global control and elimination goals. These estimates can be used for modeling, assessing infection burden, and developing a national plan for control and elimination. | 
    	
        	| Objectives | To estimate the prevalence of HBsAg and anti-HCV along with viral load of HBV and HCV in children aged 2-5 years and pregnant women in Bangladesh.
Specific Objectives:
To estimate the prevalence of HBsAg among children aged 2-5 years in Bangladesh
•To estimate the prevalence of HBsAg among pregnant women in Bangladesh
•To estimate the prevalence of anti-HCV among children aged 2-5 years in Bangladesh
•To estimate the prevalence of anti-HCV among pregnant women in Bangladesh
•To estimate the viral load of HBV in HBsAg positive children aged 2-5 years and pregnant women through PCR (HBV-DNA)
•To estimate the viral load of HCV in anti-HCV positive children aged 2-5 years and pregnant women through PCR (HCV-RNA)
•To find out the immediate source of infection of the 2-5 years old children | 
    	
        	| Study Methods | The population includes children aged 2-5 years and pregnant women, mothers of rapid diagnostic test-positive children and two other family members. The study will use a cross-sectional survey method with a sample size of 3155 children and approximately 909 pregnant women adopting the single-stage stratified cluster method. | 
    	
        	| Expected outcomes and use of results | This biomarker survey will provide reliable population-based estimates of biomarkers of hepatitis B virus and hepatitis C virus (HBsAg and Anti-HCV).
These estimates will be used for modeling, assessing infection burden, and developing a national plan for control and elimination by the National Programs of Bangladesh and also inform the global communities. | 
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        	| Keywords | Bangladesh; Hepatitis; Hepatitis B; Hapatitis C; HBV; HCV; HBsAg; anti-HCV; Pregnant Women; Children; Prevalence; |