The flu—more formally known as influenza—is a contagious, acute respiratory illness caused by influenza viruses. These viruses are one of the most common causes of respiratory infections in people of all ages and often occur as outbreaks during winter months.1 There are two main types of infl...
Influenza, commonly known as the "flu," is an extremely contagious respiratory illness caused byinfluenzaA or B viruses.Fluappears most frequently in winter and early spring. The flu virus attacks the body by spreading through the upper and/or lower respiratory tract. What's the difference betwe...
What is influenza (the flu)?The flu is a viral infection of the lungs and airways. The virus spreads through droplets in the air when someone with flu coughs or sneezes. You may also get the virus through close contact with someone who has the flu. For example, a person with the ...
Definition The flu (also called influenza) is a viral infection. It affects the respiratory system. It can cause mild to severe illness, and sometimes it can lead to death. Virus Attacking Cell 2011 Nucleus Medical Media, Inc. Causes The flu is caused by the influenza virus.GGH Business...
What is the flu? Influenza, or the flu, is a viral infection that attacks the lungs, nose, and throat. It’s a contagious respiratory illness with symptoms ranging from mild to severe. The flu and the common cold have similar symptoms. It can be difficult to distinguish between the two ...
What is influenza (the flu)?The flu is a viral infection of the lungs and airways. The virus spreads through droplets in the air when someone with the flu coughs or sneezes. The virus also spreads through close contact with someone who has the flu. For example, a person with the virus...
Influenza is the true flu. It's is a viral infection that attacks your respiratory system, including your nose, throat and lungs. At first, the flu may seem like a common cold with arunny nose, sneezing and sore throat. But colds usually develop slowly; whereas, the flu tends to come ...
Influenza (flu) is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes even the lungs. Flu mostly happens in fall and winter each year. It can cause mild to severe illness, and at times can lead to...
1. B。根据文章第一段“What is bird flu?It’s a form of influenza believed to strike all birds. Though poultry(家禽) are believed to be especially prone to(倾向于)humans”就可推出bird flu不但可以感染禽类也可以传染人。故选B。 2. B。根据文章第二段第一句话“Thailand, Vietnam, Indonesia,...
Discover what causes the flu and how to lower your risk of getting it with these tips from Theraflu. Learn about the different types of flu viruses out there.