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 virus on his or her hands can ...
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...
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, Indonesi...
Viral syndrome is a term used for symptoms of an infection caused by a virus. Viruses are spread easily from person to person on shared items.What are the signs and symptoms of viral syndrome?Signs and symptoms may start slowly or suddenly and last hours to days. They can be mild to ...
The common cold and flu are both contagious viral infections of the respiratory tract. Although the symptoms can be similar, flu is much worse. A cold may drag you down a bit, but the flu can make you shudder at the very thought of getting out of bed. ...
Prostaglandinsare molecules that act as chemical messengers in the body much like hormones. If you’re feeling feverish, it usually means your body is fighting off a viral, bacterial, or fungal infection. Your immune system activates antibodies and other chemicals like prostaglandin to destroy the ...
One of the most common causes of fever is infection, such as infection from a cold orflu virus.6,7Fever-causing viral infections are often highly contagious and spread from person to person through hand-to-hand transmission or transmission via respiratory droplets in the air.8 ...
What is influenza? 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...
14Unfortunately for humans, some viral infections are faster than the immune system. Viruses can develop much more quickly than the immune system can, which helps them greatly in uninterrupted reproduction. _15___ Viruses cause many diseases, including colds, chicken pox, SARS, flu, etc.Though ...
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 ...