Publications by authors named "Mazyanga Liwewe"
Article Synopsis
- - The study evaluated the effectiveness of COVID-19 vaccines in preventing symptomatic COVID-19 among healthcare workers (HCWs) in Zambia from May 2021 to March 2022, focusing on those with a complete vaccination schedule.
- - Researchers included 1,767 HCWs, with 282 fully vaccinated participants, and found that vaccine effectiveness (VE) was 72.7% overall, and higher during the Delta variant period (79.4%) compared to the Omicron period (37.5%).
- - The findings concluded that COVID-19 vaccines were effective in reducing symptomatic SARS-CoV-2 cases when the Delta variant was prevalent, but were less effective during the Omicron variant period.
The COVID-19 pandemic has impacted many facets of human behavior, including human mobility partially driven by the implementation of non-pharmaceutical interventions (NPIs) such as stay at home orders, travel restrictions, and workplace and school closures. Given the importance of human mobility in the transmission of SARS-CoV-2, there have been an increase in analyses of mobility data to understand the COVID-19 pandemic to date. However, despite an abundance of these analyses, few have focused on Sub-Saharan Africa (SSA).
View Article and Find Full Text PDFDuring a COVID-19 outbreak in a prison in Zambia from December 14 to 19, 2021, a case-control study was done to measure vaccine effectiveness (VE) against infection and symptomatic infection, when the Omicron variant was the dominant circulating variant. Among 382 participants, 74.1% were fully vaccinated, and the median time since full vaccination was 54 days.
View Article and Find Full Text PDFObjective: To estimate the adult prevalence of HIV among the adult population in Zambia and determine whether demographic characteristics were associated with being HIV positive.
Methods: A cross sectional population based survey to asses HIV status among participants aged 15 years and above in a national tuberculosis prevalence survey. Counselling was offered to participants who tested for HIV.
Background: Limited information exists about influenza viruses in Africa. We used data from a new sentinel surveillance system to investigate the seasonality and characteristics of influenza, including pandemic (pdm) influenza A H1N1, in Zambia.
Methods: In June 2008, we established sentinel surveillance for influenza-like illness (ILI) and severe acute respiratory illness (SARI) at 4 healthcare facilities in Zambia.