How does the flu work biology?

The influenza viruses are characterized by segmented, negative-strand RNA genomes requiring an RNA-dependent RNA polymerase of viral origin for replication. The particular structure of the influenza virus genome and function of its viral proteins enable antigenic drift and antigenic shift.

What is the biological name for flu?

Influenza is a viral infection that attacks your respiratory system — your nose, throat and lungs. Influenza is commonly called the flu, but it’s not the same as stomach “flu” viruses that cause diarrhea and vomiting.

How does the flu impact cells?

Influenza virus is a negative-stranded RNA virus that induces a profound inhibitory effect on the synthesis of cellular proteins. Much of this effect occurs at a posttranscriptional level, as viral RNAs are selectively translated while the initiation and elongation of cellular proteins are inhibited (15).

Is the flu virus made of cells?

Viruses are not made out of cells. A single virus particle is known as a virion, and is made up of a set of genes bundled within a protective protein shell called a capsid. Certain virus strains will have an extra membrane (lipid bilayer) surrounding it called an envelope.

What causes the flu?

The flu is caused by an influenza virus. Most people get the flu when they breathe in tiny airborne droplets from the coughs or sneezes of someone who has the flu. You can also catch the flu if you touch something with the virus on it, and then touch your mouth, nose, or eyes. People often confuse colds and flu.

Is the flu RNA or DNA?

All influenza viruses consist of single-stranded RNA as opposed to dual-stranded DNA. The RNA genes of influenza viruses are made up of chains of nucleotides that are bonded together and coded by the letters A, C, G and U, which stand for adenine, cytosine, guanine, and uracil, respectively.

How did the flu spread?

It mostly spreads through droplets in the air when people with flu cough, sneeze, or talk. It can spread from up to six feet away. Although it isn’t as common, the flu can also spread from surfaces — for example, if you touch something the virus is on and then touch your nose, mouth, or eyes.

What causes cold flu?

Influenza (flu) and the common cold are both contagious respiratory illnesses, but they are caused by different viruses. Flu is caused by influenza viruses only, whereas the common cold can be caused by a number of different viruses, including rhinoviruses, parainfluenza, and seasonal coronaviruses.

What happens to your body during the flu?

A bout of the flu typically follows this pattern: Days 1–3: Sudden appearance of fever, headache, muscle pain and weakness, dry cough, sore throat and sometimes a stuffy nose. Day 4: Fever and muscle aches decrease. Hoarse, dry or sore throat, cough and possible mild chest discomfort become more noticeable.

How does the flu affect the immune system?

His results demonstrated that the influenza virus triggers a bodily response that causes a rise in serum glucocorticoid levels, leading to systemic immunosuppression. Such effects render the body vulnerable to bacterial infections that would otherwise be innocuous.

Do viruses have DNA?

The properties and behaviour of viruses differ according to their nucleic acid content. Unlike cells (e.g. bacteria, plant and animal cells), viruses contain either DNA or RNA, never both; the viral nucleic acid is either single or double stranded.

Are viruses alive Yes or no?

No, viruses are not alive.

What is the basic structure of the flu virus?

The structure of the influenza virus (see Figure 1) is somewhat variable, but the virion particles are usually spherical or ovoid in shape and 80 to 120 nanometers in diameter. Sometimes filamentous forms of the virus occur as well, and are more common among some influenza strains than others.

Is the flu A virus or bacteria?

Flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs. It can cause mild to severe illness, and at times can lead to death. The best way to prevent flu is by getting a flu vaccine each year.

When did the flu start?

Although there is not universal consensus regarding where the virus originated, it spread worldwide during 1918-1919. In the United States, it was first identified in military personnel in spring 1918. It is estimated that about 500 million people or one-third of the world’s population became infected with this virus.

What is an interesting fact about the flu?

Every year, the virus kills between 12,000 and 49,000 people. Last flu season (2017-2018), 172 children died from the flu, which is now the highest number of flu-related deaths reported during a single flu season. “Of those children, 80% of them weren’t vaccinated.

What causes evolution in influenza viruses?

The three mechanisms by which influenza viruses undergo evolutionary change include mutation (antigenic drift), re-assortment (antigenic shift), and, in rare instances, recombination.

Can you get the flu twice?

While two flu outbreaks overlap one another, raising your possibilities of catching the flu infection twice, the chances of you catching the flu virus twice may still be rare.

How long can a flu last?

The flu typically lasts three to seven days, according to the CDC. Serious complications of the flu, such as pneumonia, can take longer to recover from. Some symptoms, such as a cough, can persist for more than two weeks.

What flu means?

The word flu is shorthand for “influenza,” the official name of this infectious, viral illness. It’s not unusual to get the flu, especially in the winter, and while it usually isn’t serious, it can be deadly for some groups of people. Your chances of getting the flu are greatly reduced if you get a flu shot.

Is flu a disease?

The flu is a common infectious disease caused by influenza (flu) viruses. The flu usually affects a person’s breathing system. Seasonal flu generally occurs in the fall and winter and is caused by human influenza viruses.

Why do we cough?

Coughing is an important reflex that helps protect your airway and lungs against irritants. Coughing can propel air and particles out of your lungs and throat at speeds close to 50 miles per hour. Occasional coughing is normal as it helps clear your throat and airway of germs, mucus and dust.

Can flu be caused by stress?

No. Even though anxiety can cause flu like symptoms, please don’t worry that your anxiety will actually cause you to get an influenza infection. A viral infection will not trigger a new case of anxiety, but it can trigger and intensify your anxiety if you have pre-existing anxiety disorder.

Are viruses biology?

Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity. The study of viruses is known as virology, a subspeciality of microbiology.

What is the largest virus?

Mimivirus is the largest and most complex virus known. Is it an evolutionary bridge between nonliving viruses and living organisms, or is it just an anomaly?

Do NOT follow this link or you will be banned from the site!