Viral infections cause many serious human diseases with high mortality rates. New drug‐
resistant strains are continually emerging due to the high viral mutation rate, which makes it …

Influenza is an acute respiratory disease caused by the influenza A or B virus. It often occurs
in outbreaks and epidemics worldwide, mainly during the winter season. Significant …

Since December 2016, excess all-cause mortality was observed in many European
countries, especially among people aged≥ 65 years. We estimated all-cause and influenza …

Influenza B viruses have circulated in humans for over 80 y, causing a significant disease
burden. Two antigenically distinct lineages (“B/Victoria/2/87-like” and “B/Yamagata/16/88 …

Aim Studies carried out in the early 2000s found that the number of influenza‐associated
hospitalizations and deaths was highest in seasons dominated by A (H3N2), suggesting that …

Influenza C virus (ICV) is a common yet under-recognized cause of acute respiratory illness.
ICV seropositivity has been found to be as high as 90% by 7–10 years of age, suggesting …

International case definitions recommended by the Centers for Disease Control and
Prevention (CDC), the European Centre for Disease Prevention and Control (ECDC), and …

Influenza viruses cause infectious respiratory disease characterized by fever, myalgia, and
congestion, ranging in severity from mild to life-threating. Although enormous efforts have …

Background Influenza disease burden varies by age and this has important public health
implications. We compared the proportional distribution of different influenza virus types …

Acute illnesses affecting the respiratory tract are common and form a significant component
of the work of Sport and Exercise Medicine (SEM) clinicians. Acute respiratory illness (ARill) …