Global SARS-CoV-2 seroprevalence from January 2020 to April 2022: A systematic review and meta-analysis of standardized population-based studies.

Background: Our understanding of the global scale of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection remains incomplete: Routine surveillance data underestimate infection and cannot infer on population immunity; there is a predominance of asymptomatic infections, and uneven access to diagnostics. We meta-analyzed SARS-CoV-2 seroprevalence studies, standardized to those described in the World Health Organization's Unity protocol (WHO Unity) for general population seroepidemiological studies, to estimate the extent of population infection and seropositivity to the virus 2 years into the pandemic.

Methods And Findings: We conducted a systematic review and meta-analysis, searching MEDLINE, Embase, Web of Science, preprints, and grey literature for SARS-CoV-2 seroprevalence published between January 1, 2020 and May 20, 2022.

Public health research priorities for WHO on COVID-19 in the South-East Asia Region: results of a prioritization survey.

Background: Effectively addressing the coronavirus disease 2019 (COVID-19) pandemic caused by the new pathogen requires continuous generation of evidence to inform decision-making. Despite an unprecedented amount of research occurring globally, the need to identify gaps in knowledge and prioritize a research agenda that is linked to public health action is indisputable. The WHO South-East Asia Region (SEAR) is likely to have region-specific research needs.

Early epidemiological investigations: World Health Organization UNITY protocols provide a standardized and timely international investigation framework during the COVID-19 pandemic.

Background: The declaration of Coronavirus disease 2019 (COVID-19) as a Public Health Emergency of International Concern (PHEIC) on 30 January 2020 required rapid implementation of early investigations to inform appropriate national and global public health actions.

Methods: The suite of existing pandemic preparedness generic epidemiological early investigation protocols was rapidly adapted for COVID-19, branded the 'UNITY studies' and promoted globally for the implementation of standardized and quality studies. Ten protocols were developed investigating household (HH) transmission, the first few cases (FFX), population seroprevalence (SEROPREV), health facilities transmission (n = 2), vaccine effectiveness (n = 2), pregnancy outcomes and transmission, school transmission, and surface contamination.

Changes in condom use among males who have sex with males (MSM): Measuring the effect of HIV prevention programme in Dhaka city.

Background: A systematic assessment was done to examine the effect of HIV interventions among MSM in Dhaka, Bangladesh. MSM were defined as males having sex with males but did not sell sex in the last year. MSM are hidden, marginalized and stigmatized population groups not only in Bangladesh but also globally.

The Effects of Methamphetamine Use on the Sexual Lives of Gender and Sexually Diverse People in Dhaka, Bangladesh: A Qualitative Study.

Methamphetamine use has increased among gender and sexually diverse people in several countries, including Bangladesh. This study aimed to explore the effects of methamphetamine on the sexual lives of these people in Dhaka, Bangladesh. An exploratory qualitative study was conducted, comprising 30 in-depth interviews with gender and sexually diverse people including males having sex with males, male sex workers, and transgender women (hijra) under HIV intervention coverage.

Hepatitis C virus treatment in people who inject drugs (PWID) in Bangladesh.

Background: Given the considerable social marginalization experienced by people who inject drugs (PWID), treatment of hepatitis C virus (HCV) in this population presents unique challenges. This study assessed the feasibility of treating HCV infection with direct-acting antiviral (DAA) medications among PWID receiving harm reduction services from a Drop-in-Center in Dhaka, Bangladesh.

Methods: In this prospective study conducted between December 2016 and May 2018, 200 PWID with either recent injecting drug use (i.

Understanding the reasons for using methamphetamine by sexual minority people in Dhaka, Bangladesh.

Background: Internationally, methamphetamine use is prevalent among males who have sex with males (MSM) and transgender women (hijra), with studies showing its association with risky sexual behaviours leading to HIV transmission. This study aimed to explore the underlying reasons for methamphetamine use among MSM and hijra in Bangladesh.

Methods: We conducted 30 in-depth interviews with MSM and hijra and six focus groups with MSM, hijra and service providers.

Incarceration history and risk of HIV and hepatitis C virus acquisition among people who inject drugs: a systematic review and meta-analysis.

Background: People who inject drugs (PWID) experience a high prevalence of incarceration and might be at high risk of HIV and hepatitis C virus (HCV) infection during or after incarceration. We aimed to assess whether incarceration history elevates HIV or HCV acquisition risk among PWID.

Methods: In this systematic review and meta-analysis, we searched MEDLINE, Embase, and PsycINFO databases for studies in any language published from Jan 1, 2000 until June 13, 2017 assessing HIV or HCV incidence among PWID.

Hepatitis C virus infections among clients attending an HIV testing and counseling center in Dhaka, Bangladesh.

The prevalence of hepatitis C virus (HCV) and genotypes among 965 individuals attending an HIV testing and counseling unit in Dhaka Bangladesh during Jan-Dec 2011 was determined. Anti-HCV antibody was detected in 4.4% individuals; the highest rate 37.

Effectiveness of a live oral human rotavirus vaccine after programmatic introduction in Bangladesh: A cluster-randomized trial.

Background: Rotavirus vaccines are now globally recommended by the World Health Organization (WHO), but in early 2009 WHO's Strategic Advisory Group of Experts on Immunization reviewed available data and concluded that there was no evidence for the efficacy or effectiveness of a two-dose schedule of the human rotavirus vaccine (HRV; Rotarix) given early at 6 and 10 wk of age. Additionally, the effectiveness of programmatic rotavirus vaccination, including possible indirect effects, has not been assessed in low-resource populations in Asia.

Methods And Findings: In Bangladesh, we cluster-randomized (1:1) 142 villages of the Matlab Health and Demographic Surveillance System to include two doses of HRV with the standard infant vaccines at 6 and 10 wk of age or to provide standard infant vaccines without HRV.

A success story: identified gaps and the way forward for low HIV prevalence in Bangladesh.

Bangladesh remains a low prevalence country for HIV infection. In this article we attempt to address the reasons for the present success in this country and the challenges lying ahead to minimise the spread of HIV in the future.

Sexually Transmitted Infections and Associated Risk Factors Among Street-Based and Residence-Based Female Sex Workers in Dhaka, Bangladesh.

Background: Female sex workers (FSWs) in Bangladesh remain at elevated risk of sexually transmitted infections (STIs) although the human immunodeficiency virus (HIV) prevalence among them is low. Recent information on the burden and etiological diagnosis of STIs among them has been lacking. This study examines prevalence and risk behaviors of selected STIs among FSWs in Dhaka in 2014.

Efficacy of a Russian-backbone live attenuated influenza vaccine among young children in Bangladesh: a randomised, double-blind, placebo-controlled trial.

Background: The rates of influenza illness and associated complications are high among children in Bangladesh. We assessed the clinical efficacy and safety of a Russian-backbone live attenuated influenza vaccine (LAIV) at two field sites in Bangladesh.

Methods: Between Feb 27 and April 9, 2013, children aged 2-4 years in urban Kamalapur and rural Matlab, Bangladesh, were randomly assigned in a 2:1 ratio, according to a computer-generated schedule, to receive one intranasal dose of LAIV or placebo.

Norovirus diarrhea in Bangladesh, 2010-2014: prevalence, clinical features, and genotypes.

Norovirus infections in diarrhea patients attending an urban and a rural hospital in Bangladesh were investigated. A total of 953 fecal specimens from both children and adults collected during 2010-2014 were tested for the presence of norovirus using real time PCR. One fourth (25%) of the specimens were positive for norovirus RNA which was identified both in children and adults.

Point of care HIV testing with oral fluid among returnee migrants in a rural area of Bangladesh.

Objectives: To determine HIV prevalence and assess the acceptability of HIV testing using oral fluid as a point of care (PoC) test method among returnee migrants in a rural area of Bangladesh.

Design: A cross-sectional study.

Methods: Matlab is a rural area southeast of Dhaka where icddr,b hosts a health and demographic surveillance system covering 225,826 people of whom 934 are returnee migrants.

Noninterference of Rotavirus Vaccine With Measles-Rubella Vaccine at 9 Months of Age and Improvements in Antirotavirus Immunity: A Randomized Trial.

Background: The burden of rotavirus morbidity and mortality is high in children aged <5 years in developing countries, and evaluations indicate waning protection from rotavirus immunization in the second year. An additional dose of rotavirus vaccine may enhance the immune response and lengthen the period of protection against disease, but coadministration of this dose should not interfere with immune responses to concurrently given vaccines.

Methods: A total of 480 9-month-old participants from Matlab, Bangladesh, were enrolled in a study with a primary objective to establish noninferiority of concomitant administration of measles-rubella vaccine (MR) and a third dose of human rotavirus vaccine (HRV; MR + HRV), compared with MR given alone.

Profile of an HIV Testing and Counseling Unit in Bangladesh: Majority of New Diagnoses among Returning Migrant Workers and Spouses.

Introduction: Analysis of data from HIV testing and counseling (HTC) services provides an opportunity to identify important populations for targeting of HIV prevention efforts. Our primary aim was to describe the demographics of clients presenting to HTC in Bangladesh, a low HIV prevalence country. Our secondary aim was to determine the risk factors for HIV positivity among returning migrant workers who were tested.

Substance Use and HIV Among Female Sex Workers and Female Prisoners: Risk Environments and Implications for Prevention, Treatment, and Policies.

Female sex workers (FSWs) and female prisoners experience elevated HIV prevalence relative to the general population because of unprotected sex and unsafe drug use practices, but the antecedents of these behaviors are often structural in nature. We review the literature on HIV risk environments for FSWs and female prisoners, highlighting similarities and differences in the physical, social, economic, and policy/legal environments that need to be understood to optimize HIV prevention, treatment, and policy responses. Sex work venues, mobility, gender norms, stigma, debt, and the laws and policies governing sex work are important influences in the HIV risk environment among FSWs, affecting their exposure to violence and ability to practice safer sex and safer drug use behaviors.

Effects of oseltamivir treatment of index patients with influenza on secondary household illness in an urban setting in Bangladesh: secondary analysis of a randomised, placebo-controlled trial.

Background: Antiviral drugs are a proposed medical intervention to reduce household transmission of influenza viruses. In a previously described randomised, placebo-controlled trial in Dhaka, Bangladesh, we showed that oseltamivir treatment of index patients was able to reduce influenza symptom duration and virus shedding. In a further analysis that is part of the same study, we aimed to assess efficacy of oseltamivir to reduce secondary household illnesses in the same cohort.

Vulnerability of Bangladeshi street-children to HIV/AIDS: a qualitative study.

Background: Children living on the streets are an underprivileged population of Bangladesh and are likely to be more vulnerable to STIs/HIV for their day-to-day risky behaviours and lifestyles. This study assessed the vulnerability of Bangladeshi street-children to HIV/AIDS using qualitative participatory methods.

Methods: This ethnographic participatory, qualitative study was conducted during February 2010- December 2011 among children aged 5-12 years, who live and/or work on the streets in Dhaka, the capital city of Bangladesh.