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NEET UG 2026 » NEET UG Study Material » Biology » Cold
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Cold

Cold, often known as the common cold, is a sickness characterised by symptoms such as a headache, runny nose, scratchy throat, fever, and non stop sneezing. It is a viral infectious disease of the upper respiratory tract that usually affects the nose, but can also affect the sinuses, ears, and bronchial tubes in some cases.

Table of Content
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Introduction

Viruses are responsible for the spread of the common cold. Some of them are as follows:

The Root Causes of the Common Cold

Rhinovirus – This virus frequently infiltrates your system during the early fall, spring, and summer seasons, among other times. They are responsible for 10 percent to 40 percent of all colds. Despite the fact that these are the most prevalent viruses that impact you, they are unlikely to cause you to become very ill.

Coronavirus – This virus affects the human body during the winter and early spring months, causing symptoms such as fever and headaches. This virus is responsible for 20 percent of all colds. There are more than 30 different varieties of coronaviruses, with only three or four of them being hazardous.

RSV and parainfluenza – These microorganisms are the cause of severe diseases in young children, such as pneumonia and bronchitis.

Pneumonia is a lung infection that causes symptoms such as coughing, fever, and difficulty breathing. Some more signs and symptoms would be as follows:

Symptoms

Coughing up mucus (sputum) from your lungs, which may be rusty or green in colour or tinged with blood is a sign of pneumonia.

Diarrhea

Fever

Shaking and “teeth-chattering” chills are experienced.

Rapid breathing and a sense of being out of breath

a rapid heartbeat

Chest discomfort that is exacerbated when you cough or take a deep breath

It is possible to become infected by a person who has a cold. When you come into contact with germ-containing surfaces or objects used by them and then touch your nose or mouth, you increase your chances of becoming infected by the germs or virus.

The possibility of getting sick if you’re in close proximity to a person who has a cold is high, as their sneeze could contaminate the air you’re breathing passively.

When a virus attaches itself to the lining of the nose or throat, the infection of a cold begins to develop. The immune system of the body sends out white blood cells (WBC) to assault the invading organism, and it is through this process that the cold is defeated.

Symptoms that appear to be primary

Having a scratchy or aching throat

Sneezing

Nose congestion

Coughing and a runny nose

Eyes that are watering

It feels like mucus is leaking from the back of your throat.

Symptoms that occur as a result of the primary condition (Secondary Symptoms)

Fever that is extremely high

Muscle aches and pains

Fatigue

Having a headache

Appetite sluggishness

Prevention

Although it is virtually hard to totally prevent the spread of colds, you can take steps to lower your chances of contracting one by following these guidelines.

Wash your hands frequently – This is probably the most effective way to avoid the spread of a cold or any other type of infection. Hand sanitizer should be used whenever possible in public locations, and it should be a priority to wash hands before eating. Instruct children on the necessity of hand washing as well.

Avoid touching your face — If you are in close proximity to someone who has a cold, avoid touching your face, mouth, nose, and eye areas.

Control emotional stress — People who are subjected to high levels of emotional stress on a daily basis have a weakened immune system, which means they are more susceptible to catching a cold. Reduce your stress levels and have a healthy lifestyle.

Keeping everything clean – Clear away any debris from domestic surfaces such as doorknobs, drawer pulls, keyboards, light switches, telephones, television remote controls, and counters and sinks. These are the locations where viruses can be found for several hours after they have been used by a person who has been affected.

Reduce your exposure to cigarette smoke – Cigarette smoke may increase your risk of contracting a cold or other infection. Passive smoking should be avoided as well.

Drink plenty of fluids – Hydrate yourself with water, juice, clear broth, warm lemon water, chicken soup, and other warm liquids to keep your body hydrated. These will assist you in avoiding catching a cold or the flu.

Myths Regarding the Common Cold

It is important to note that being cold or wet does not cause cold sickness. You only become infected with a cold if you are more susceptible to it. When you are excessively exhausted, in mental turmoil, or have allergies to nasal and throat symptoms, you are more susceptible to catching a cold than usual.

Another myth holds that your food is the root cause of a certain illness or infection, which is just not the case. Another type of fraud is when people claim that you’re getting sick because your tonsils or adenoids are huge and infected.

Conclusion

 Acute cough caused by the common cold is probably the most common cause of acute cough in the general population. A considerable subset of individuals with “postinfectious” cough have an inflammatory response produced by a viral upper respiratory infection, which is most likely the cause of their symptoms (ie, the common cold). It is possible that the resulting subacute or chronic cough is caused by an upper airway cough syndrome, which was previously referred to as postnasal drip syndrome, which can be treated. Unless the process is stopped by active treatment, it has the potential to continue indefinitely.

 

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