Flu & COVID What is flu (influenza)? Picture of the influenza virus Influenza, commonly called "the flu," is an illness caused by RNA viruses (Orthomyxoviridae family) that infect the respiratory tract of many animals, birds, and humans. In most people, the infection results in the person...
C When cold and flu season arrives, you might notice that your symptoms (症状) seem to worsen as the day turns to night. This is a real effect.Our body's biological clock plays an important role. At night, this clock tells our immune(免疫) cells to become more active as they search...
The flu is caused by viruses. Type A and Type B influenza viruses are what cause the main outbreaks of the flu each year. Type A is often hosted in animals such as such as ducks, chickens, pigs and whales, then passed on to humans, and is often more severe.3Type B is found only ...
That’s because it’s possible for the two flu types to exchange genetic material, forming a new flu virus that could spread among humans. Yet vaccination coverage this season has been lacking. Less than half of adults (42.7%) had gotten their annual flu shot as of the week ended Dec. ...
Here’s what you need to know about flu season and the vaccine: (MORE: The severity of this year's flu virus and what to expect from the vaccine) When does flu season start? Flu season may start as early as October in North America, but generally, it begins so...
And if you do come down with the virus, one of the main questions you might have is how long does the flu last? First, let's get the timeline straight: Flu season occurs in fall and winter and typically peaks in February and December, according to the Centers for Disease Control and ...
If you could prevent contact with people who have the flu, you are well on your way to avoiding the flu all season long. But that shouldn’t be the only thing you do to prevent the flu this season. According to the CDC approximately five to twenty percent of the United States ...
"The signs and symptoms of a cold usually peak within 2 to 3 days of infection," the CDC adds. Walking pneumonia, RSV and whooping cough Colds and flu aren't the only illnesses to be aware of this season. Walking pneumonia, for example, is on the rise among young kids. The number...
The flu (short for influenza) is a respiratory virus that affects the throat, nose, bronchi and, sometimes, the lungs.
Learn about influenza (flu) symptoms, treatment with antiviral drugs, flu shot side effects, and prevention during flu season. Discover when to get the flu vaccine, how long the flu lasts, the contagious period, flu types, and how it spreads.