Common Cold vs Flu - Difference and Comparison

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From Diffen

	Common Cold	Flu
Fever:	Rare	Usually present
Vaccination possible:	No	Yes
Severity:	Usually does not cause severe health problems	Serious health problems, such as pneumonia, bacterial infections, or hospitalizations can occur.
Sore throat:	Common	Rare
Stuffy nose:	Common	Rare
Can be diagnosed:	No	Yes
Headache:	Rare	Common
Chest discomfort:	Mild to moderate	Often severe
Sneezing:	Common	Rare
Coughing:	Hacking, productive cough	Dry, unproductive cough
Sudden symptoms:	Appear gradually	Can appear within 3-6 hours
Causative Organism:	adenoviruses, coronaviruses or rhinoviruses	Influenza virus
Chills:	Rare	Common
Fatigue:	Mild	Moderate to severe
Aches:	Slight	Usual and often severe

Cold and flu are both respiratory illnesses and many people use the terms interchangeably. However, they are both caused by different viruses.

1 Symptoms of Common Cold vs Flu
2 Infection mechanism for common cold vs flu
3 Prevention of flu and common cold
4 Treatment for flu vs common cold
- 4.1 Treatment for Common cold
- 4.2 Flu treatment
5 Related Articles
6 References

[edit] Symptoms of Common Cold vs Flu

The flu (influenza) is a lot more serious than a common cold. With a cold, the symptoms are centered around the nose and throat. But the flu tends to make the whole body ache the patient is sick all over.

The symptoms of a cold include a runny or blocked nose, sneezing, minor throat irritation, mild fever, sore throat, a feeling that your ears are blocked, and finally coloured mucus or nasal discharge (which means that your immune system is fighting the infection).

Symptoms of influenza usually start suddenly with a high fever and you may feel sick enough to go to bed. Other symptoms include, irritation in the throat or lungs, a dry cough, high fever, shivering, sweating and severe muscle aches.

Tests are available to diagnose the flu but there are no such tests for colds.

[edit] Infection mechanism for common cold vs flu

Both illnesses are airborne and contagious, the flu more so because of its short incubation period. The most common way to catch the flu or a cold is to inhale droplets from coughs or sneezes. Sneezes expel a significantly larger concentration of virus "cloud" than coughing. The "cloud" is partly invisible and falls at a rate slow enough to last for hours—with part of the droplet nuclei evaporating and leaving much smaller and invisible "droplet nuclei" in the air. Droplets from turbulent sneezing or coughing or hand contact also can last for hours on surfaces. The incubation period (time between becoming infected and developing symptoms) is 1-3 days. The infectious period (time during which an infected person can infect others) begins about 1 day before symptoms begin, and continues for the first 5 days of the illness. Symptoms, however, are not necessary for viral shedding or transmission, as a percentage of asymptomatic subjects exhibit viruses in nasal swabs, likely controlling the virus at concentrations too low for them to have symptoms.

[edit] Prevention of flu and common cold

Another difference between common cold and the flu is that the flu is preventable. Every year, only a handful of strains of the influenza virus cause most of the flu across the world. Consequently, scientists work on the flu vaccine every year. While the vaccine is fairly effective, unanticipated flu strains can evolve against which the vaccine will fail. A nasal spray flu vaccine is also available.

On the other hand, the common cold is caused by a large variety of viruses, which mutate quite frequently during reproduction, resulting in constantly changing virus strains. Thus, successful immunization is highly improbable.

The best way to avoid a cold is to avoid close contact with existing sufferers; to wash hands thoroughly and regularly; and to avoid touching the mouth and face. Anti-bacterial soaps have no effect on the cold virus — it is the mechanical action of hand washing that removes the virus particles.

[edit] Treatment for flu vs common cold

[edit] Treatment for Common cold

There is no cure for the common cold. Treatment is limited to symptomatic supportive options, maximizing the comfort of the patient, and limiting complications and harmful sequelae. The most reliable treatment is a combination of fluids and plenty of rest. The National Institute of Allergy and Infectious Diseases suggests getting plenty of rest, drinking fluids to maintain hydration, gargling with warm salt water, using cough drops, throat sprays, or over-the-counter pain or cold medicines. Saline nasal drops may help alleviate congestion.

The common cold is self-limiting, and the host's immune system effectively deals with the infection. Within a few days, the body's humoral immune response begins producing specific antibodies that can prevent the virus from infecting cells. Additionally, as part of the cell-mediated immune response, leukocytes destroy the virus through phagocytosis and destroy infected cells to prevent further viral replication. In healthy, immunocompetent individuals, the common cold resolves in seven days on average.

Although some people take antibiotics to treat common cold, doctors believe that antibiotics are not at all effective in treating common cold. This is because cold is caused by a virus and not a bacteria.

[edit] Flu treatment

People with the flu are advised to get plenty of rest, drink a lot of liquids, avoid using alcohol and tobacco and, if necessary, take medications such as paracetamol (acetaminophen) to relieve the fever and muscle aches associated with the flu. Children and teenagers with flu symptoms (particularly fever) should avoid taking aspirin during an influenza infection (especially influenza type B) because doing so can lead to Reye's syndrome, a rare but potentially fatal disease of the liver.[82] Since influenza is caused by a virus, antibiotics have no effect on the infection; unless prescribed for secondary infections such as bacterial pneumonia, they may lead to resistant bacteria. Antiviral medication is sometimes effective, but viruses can develop resistance to the standard antiviral drugs.

The two classes of anti-virals are neuraminidase inhibitors and M2 inhibitors (adamantane derivatives). Neuraminidase inhibitors are currently preferred for flu virus infections. The CDC recommended against using M2 inhibitors during the 2005–06 influenza season.