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Published on: Jan 29, 2022
2 minute read
By: Second Medic Expert

Understanding Quarantine

What Is Quarantine?

Quarantine is the segregation of people who are infected or suspected of being infected with a particular disease.

It is also the isolation of patients with communicable diseases to prevent their spread. The purpose of quarantine is to protect the public from exposure to potentially deadly diseases. Quarantine is for people who don’t have symptoms but who might have been exposed to the coronavirus. The idea is to keep you from unknowingly infecting others.

Who Needs to Quarantine?

You probably don't need to quarantine yourself, but if you are close contact with someone who has tested positive for coronavirus or just got back from a country where this deadly virus is spreading then it's best that we keep our distance until things calm down.

The reason for this is twofold. First, it's important to prevent the spread of the virus. Secondly, it's important to give those who are an infected time to recover without exposing others to the virus.

There are also a few other groups of people who may need to consider quarantining themselves, such as healthcare workers and those who work with livestock. Anyone who’s been in close contact with a person who has COVID-19 should self-quarantine, even if you’ve had the virus before.

“Close contact” means you did one or more of these things:

Were within 6 feet of the person for at least 15 minutes
Cared for the person at home
Touched, hugged, or kissed them
Shared eating or drinking utensils with them
Got droplets on you when they sneezed or coughed

According to the CDC, you’ll need to quarantine:

If You’re 18 or older and have completed the primary series of the recommended vaccines. But you have not received a recommended booster shot after you became eligible.
If You received the vaccine over 2 months ago but haven’t received the recommended booster shot.
If You’re not vaccinated or haven’t yet completed your first full round of vaccines.

You don’t need to quarantine:

If You’re 18 or older and have received all recommended vaccine doses, including boosters and additional shots recommended for immunocompromised people.
If You’re 5-17 years old and completed the primary series of COVID-19 vaccines.
You had COVID-19 within the last 90 days. This should have been confirmed using a viral test.

However, if you were exposed to someone who tested positive, wear a well-fitting mask around others for 10 days after exposure.

How to Quarantine at Home

There are a few simple steps you can take to quarantine at home:

1.Sanitize your environment - Make sure to clean all surfaces and objects in your home that may have meet the disease. You can use a disinfectant or bleach solution to do this.

2.Isolate yourself - You should isolate yourself from other people in your home and avoid contact with anyone who may be infected.

3.Monitor your symptoms - Be on the lookout for any symptoms of the disease and report them immediately to your doctor.

4.Stay hydrated - Make sure to drink plenty of fluids to help keep your body healthy and fight off any potential infections.

How Long Does Quarantine Last?

Stay home for at least 5 days after your last contact with a person who has COVID-19. Wear masks when around others so that you do not pass on the infection to them!

For 10 days after your last close contact with someone with COVID-19, watch for fever (100.4 F or higher), cough, shortness of breath, or other COVID-19 symptoms.

If you develop symptoms, get tested immediately and isolate until you receive your results. If you test positive, follow isolation recommendations below.

If you don't develop symptoms, get tested at least 5 days after your last exposure. Positive tests allow for limited movement in and out of homes but continue wearing protective gear around others until 10 more are complete."

If you test positive for COVID-19, isolation is necessary. The recommended period of time without contact should be at least 5 days from the date that your symptoms began and may also need to extend beyond 10 if they continue after this length time has passed; however, it’s important not make assumptions about how long an individual will remain infected before developing others signs/symptoms because everyone's situation varies!

When you get the new coronavirus, your quarantine lasts five days because that’s how long it takes to know if you have symptoms. If there are no signs of illness after this time period has passed then treatments for virus should be considered over with just one quick visit from our doctors!

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Impact of Air Pollution on Human Health: Risks, Effects and Prevention

Air pollution has become one of the most serious public health challenges worldwide. In India, rapid urbanisation, vehicle emissions, industrial activity and seasonal factors contribute to high pollution levels, especially in metropolitan cities. Understanding the impact of air pollution on human health is essential because exposure to polluted air significantly increases the risk of chronic illness and premature death.

According to the World Health Organization, air pollution is responsible for millions of premature deaths globally each year. Studies published in The Lancet highlight India as one of the countries most affected by air quality-related health burdens.

What Is Air Pollution?

Air pollution occurs when harmful substances such as:

particulate matter (PM2.5 and PM10)
nitrogen dioxide
sulfur dioxide
ozone
carbon monoxide

accumulate in the atmosphere at unsafe levels.

Among these, PM2.5 particles are particularly dangerous because they are small enough to penetrate deep into the lungs and bloodstream.

Respiratory Health Effects

The most immediate and visible impact of air pollution is on the lungs.

Short-Term Effects

coughing
throat irritation
wheezing
shortness of breath

Long-Term Effects

chronic bronchitis
asthma worsening
reduced lung capacity
chronic obstructive pulmonary disease (COPD)

Children and elderly individuals are especially vulnerable.

Impact on Heart Health

Air pollution does not only affect the lungs. Fine particles enter the bloodstream and trigger inflammation.

Long-term exposure increases risk of:

hypertension
heart attack
stroke
atherosclerosis

ICMR reports show cardiovascular diseases remain a leading cause of mortality in India, with pollution being a significant contributing factor.

Impact on Immune System

Constant exposure to polluted air weakens the immune response.

This leads to:

frequent respiratory infections
slower recovery from illness
increased susceptibility to viral diseases

Pollution also increases systemic inflammation.

Effect on Children’s Health

Children are particularly vulnerable because:

their lungs are still developing
they breathe more air relative to body weight
they spend time outdoors

Long-term exposure may reduce lung growth and increase asthma risk.

Impact on Pregnant Women and Infants

Research published in Lancet indicates that high pollution exposure during pregnancy increases risk of:

low birth weight
premature birth
developmental complications

Protecting pregnant women from pollution exposure is critical.

Air Pollution and Cancer Risk

Prolonged exposure to air pollution increases the risk of lung cancer.

WHO classifies outdoor air pollution as a carcinogen.

Mental Health and Cognitive Impact

Emerging research suggests pollution may contribute to:

cognitive decline
mood disorders
reduced concentration

Clean air supports brain health.

Seasonal Pollution in India

During winter months, many cities experience severe smog due to:

crop burning
temperature inversion
increased emissions

Monitoring Air Quality Index (AQI) helps individuals take precautions.

Signs of Pollution-Related Health Impact

persistent cough
chest tightness
eye irritation
unusual fatigue
worsening asthma

Individuals experiencing these symptoms should consult healthcare providers.

Preventive Measures to Reduce Exposure

Monitor AQI

Avoid outdoor activities during high pollution days.

Use Protective Masks

N95 masks filter fine particles effectively.

Indoor Air Quality

Use air purifiers and keep windows closed during peak pollution.

Avoid High-Traffic Areas

Limit time near busy roads.

Maintain Healthy Lifestyle

Strong immunity helps reduce pollution-related health risks.

Role of Preventive Healthcare

Regular screening for:

lung function
blood pressure
heart health

helps detect early damage caused by pollution.

Urban populations should prioritise routine health checkups.

Long-Term Public Health Impact

Air pollution contributes significantly to:

healthcare burden
productivity loss
economic strain

Preventive awareness and environmental policies are essential.

Conclusion

The impact of air pollution on human health is profound and far-reaching. From respiratory disorders and heart disease to immune suppression and increased cancer risk, polluted air affects nearly every organ system. In India’s urban environment, proactive measures such as monitoring AQI, using protective masks and maintaining regular health screenings are crucial. Protecting oneself from air pollution is not just about comfort—it is a vital step in preserving long-term health and preventing chronic disease.

References

World Health Organization (WHO) – Air Pollution and Health Reports
Indian Council of Medical Research (ICMR) – Environmental Health Studies
National Family Health Survey (NFHS-5) – Respiratory and Cardiovascular Data
NITI Aayog – Environmental and Preventive Health Strategy Reports
Lancet – Global Burden of Disease and Air Pollution Research

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