Background Studies describing the epidemiology of influenza B lineages in South Africa are
lacking. Methods We conducted a prospective study to describe the circulation of influenza …

Background The impact of influenza B virus circulation in Sub-Saharan Africa is not well
described. Methods We analyzed data from acute respiratory illness (ARI) in Kenya. We …

We describe the epidemiological characteristics, pattern of circulation, and geographical
distribution of influenza B viruses and its lineages using data from the Global Influenza B …

While influenza A viruses comprise a heterogeneous group of clinically relevant influenza
viruses, influenza B viruses form a more homogeneous cluster, divided mainly into two …

Background The evolution of influenza viruses is characterized by the co-circulation of two
antigenically and genetically distinct lineages B/Victoria/2/87-like viruses (Victoria) and …

Background Influenza B is characterised by two antigenic lineages: B/Victoria and
B/Yamagata. These lineages circulate together with influenza A during influenza seasons …

Introduction Literature on influenza focuses on influenza A, despite influenza B having a
large public health impact. The Global Influenza B Study aims to collect information on …

Background We describe the relative proportions and epidemiological features of influenza
B/Victoria and B/Yamagata, using data from nationwide surveillance systems. Methods We …

Background Influenza B viruses are a major cause of serious acute respiratory infections in
humans. Methods Nasopharyngeal swabs were collected from subjects with influenza-like …

Influenza virus types A and B are responsible for acute viral infections that affect annually 1
billion people, with 290,000 to 650,000 deaths worldwide. In this study, we investigated the …