COVID-19

Gambaran keseluruhan

COVID-19 is an infectious disease caused by a coronavirus called SARS-CoV-2. A coronavirus is a type of virus that can cause illness in people and animals. When this particular virus infects a person, it mainly affects the respiratory system — the nose, throat, and lungs — though it can impact many other parts of the body too. Most people who get COVID-19 will feel unwell for a short time and recover fully at home. Some people, however, become more seriously ill and need hospital care.

COVID-19 has been one of the most widespread infectious diseases in modern history. Since it was first identified in late 2019, it has spread to every country in the world. Tens of millions of cases are still recorded globally each year. While the acute (sudden and intense) emergency phase of the pandemic has eased in many places, the virus continues to circulate and cause illness worldwide.

COVID-19 can infect anyone, regardless of age or background. However, older adults and people who have underlying health conditions — such as heart disease, diabetes, obesity, or a weakened immune system — are at higher risk of becoming seriously ill. Pregnant people may also face additional risks. Children generally experience milder illness, though they are not completely immune to complications. People who are unvaccinated tend to experience more severe disease.

Gejala

Gejala biasa

• Fever (a high body temperature, usually 37.8°C / 100°F or above)
• A new, continuous cough
• Loss of, or change in, your sense of smell or taste
• Fatigue (extreme tiredness that does not improve with rest)
• Headache
• Sore throat
• Runny or blocked nose
• Muscle aches and pains
• Shortness of breath with activity
• Nausea (feeling sick), vomiting, or diarrhoea
• Chills or shivering

Gejala pada kanak-kanak

• Fever
• Cough
• Runny nose
• Tiredness or low energy
• Vomiting or stomach pain
• Rash (skin reaction)
• Most children have mild symptoms and recover quickly
• In rare cases, children can develop a serious inflammatory condition called MIS-C (Multisystem Inflammatory Syndrome in Children), which causes swelling throughout the body — seek urgent medical advice if your child has a high fever lasting more than 24 hours along with a rash, red eyes, or unusual swelling

Gejala pada orang dewasa yang lebih tua

• Older adults may not always develop a fever even when infected
• Confusion or sudden changes in behaviour or mental alertness
• Unusual tiredness or weakness
• Loss of appetite
• Worsening of existing health conditions
• Falls or difficulty moving around
• Symptoms of dehydration (dry mouth, dizziness, dark urine)

Punca

Punca utama

• COVID-19 is caused by the SARS-CoV-2 virus, which belongs to a family of viruses called coronaviruses.
• The virus spreads primarily through the air — when an infected person breathes, speaks, sings, coughs, or sneezes, they release tiny particles that others can inhale.
• Close contact (within about 2 metres / 6 feet) with an infected person carries the highest risk of transmission.
• The virus can also spread by touching surfaces contaminated with the virus and then touching your face, though this is considered a less common route.
• People can spread the virus even before they feel unwell, or if they never develop symptoms at all — this is called asymptomatic transmission.
• The virus continues to evolve, producing new variants (slightly changed versions of the virus) that can spread differently or cause different levels of illness.

Faktor risiko

• Older age — risk of severe illness increases significantly with age
• Not being vaccinated or not being up to date with recommended vaccine doses
• Obesity (excess body weight that puts strain on the body)
• Type 2 diabetes (a condition affecting how your body manages blood sugar)
• Chronic (long-term) heart or lung disease
• Chronic kidney disease
• A weakened immune system — due to conditions such as HIV, certain cancers, or medications that suppress immunity
• Pregnancy — can increase the risk of premature birth and other complications
• Smoking or a history of heavy smoking
• Living in crowded or poorly ventilated (low fresh air) spaces
• Working in healthcare or other high-exposure environments
• Neurological conditions (conditions affecting the brain and nervous system)

Bila perlu berjumpa doktor

Jumpa doktor dengan segera jika:

• Your breathing becomes difficult or laboured
• Your symptoms worsen rapidly after initially improving
• You have a high fever for more than 3 days that is not responding to general self-care measures
• You are pregnant and have COVID-19 symptoms
• You are caring for a child who seems very unwell or has a high fever lasting more than 24 hours
• You have an underlying health condition and feel significantly unwell
• You are unsure whether your symptoms are COVID-19 or something else serious

Buat temujanji rutin jika:

• You tested positive for COVID-19 and want guidance on how to manage your recovery at home
• You are experiencing lingering symptoms weeks after your initial infection (possible Long COVID)
• You want to understand whether you are eligible for any specific medical treatments for COVID-19
• You want to check whether you are up to date with recommended vaccinations
• You have concerns about mental health or anxiety following your illness

Diagnosis

COVID-19 is diagnosed by testing to detect the presence of the SARS-CoV-2 virus or your body's response to it. Your healthcare provider will ask about your symptoms and may examine you. A positive test, combined with your symptoms, will usually confirm a COVID-19 diagnosis. In a hospital setting, doctors may also perform additional tests to understand how the illness is affecting your body.

Ujian yang mungkin dilakukan

• Rapid lateral flow antigen test (LFT) — a quick, self-administered test using a nose or throat swab. Results are usually available within 15–30 minutes. These tests detect proteins from the virus. They are widely available and useful for identifying infection when you have symptoms.
• PCR test (Polymerase Chain Reaction) — a laboratory test that analyses a nose or throat swab for the genetic material of the virus. PCR tests are more sensitive (better at detecting the virus) than rapid tests and are usually processed at a lab, with results taking several hours to a day.
• Blood tests — used in hospital settings to check for signs of inflammation (your body's response to infection), organ function (how well your kidneys, liver, and other organs are working), and the presence of blood clots.
• Chest X-ray or CT scan — imaging tests that create pictures of your lungs, used when doctors need to check for pneumonia (lung infection) or other complications.
• Oxygen saturation monitoring — a small clip placed on your finger measures the level of oxygen in your blood. Low oxygen levels can be an early warning sign of serious illness, even before you feel very breathless.

Apa yang diharapkan semasa temujanji anda

If you have mild symptoms, your healthcare provider will likely advise you to test at home using a rapid test and rest at home. You probably will not need to visit a clinic unless your symptoms worsen. If you are more unwell or are in a higher-risk group, your provider may arrange a PCR test or ask you to come in for an examination and further tests. In hospital, the medical team will monitor your breathing, oxygen levels, and overall condition closely, adjusting your care as needed. The process is designed to make sure you are as safe and comfortable as possible.

Rawatan

Treatment for COVID-19 depends on how unwell you are and your personal risk factors. Most people with mild illness can recover safely at home with rest and good self-care. People with more serious illness — or those at higher risk of complications — may be offered specific medical treatments. In severe cases, hospital care, including oxygen therapy or breathing support, may be needed. Your healthcare provider is the right person to decide what treatment is best for you.

Penjagaan diri di rumah

• Rest as much as your body needs — sleep and rest are key to recovery
• Stay well hydrated by drinking plenty of water and clear fluids throughout the day
• Over-the-counter pain relievers and fever reducers (medicines you can buy without a prescription) can help ease symptoms like headache, body aches, and fever — always follow the instructions on the packaging and check with a pharmacist if you are unsure
• Use a saline (salt water) nasal spray or rinse to ease a blocked nose
• Gargle with warm salty water to soothe a sore throat
• Monitor your oxygen levels with a pulse oximeter (a small device that clips on your finger) if one is available, especially in the first 5–10 days
• Open windows to keep your home well ventilated
• Isolate yourself from others in your household, especially those who are vulnerable, to avoid spreading the virus
• If you must be around others, wear a well-fitting face mask
• Keep track of your symptoms — write down when they started, how they are changing, and any new symptoms that appear

Rawatan perubatan

For people who are at higher risk of serious illness — such as older adults, immunocompromised individuals (people with a weakened immune system), and those with certain health conditions — healthcare providers may offer antiviral treatments. These are medicines that work by stopping the virus from multiplying inside the body. They are most effective when started early in the illness, so it is important to contact your healthcare provider as soon as possible if you are at high risk and test positive. In hospital, treatment may include supplemental oxygen (extra oxygen delivered through a mask or nasal tubes), medications that reduce the body's inflammatory response (its overreaction to infection), and, in severe cases, mechanical ventilation (a machine that helps you breathe). Blood thinning therapy may be used to prevent blood clots, which can be a complication of COVID-19. All treatment decisions are made by your healthcare team based on your individual situation.

Bila pembedahan dipertimbangkan?

Surgery is not a treatment for COVID-19 itself. However, if complications arise — such as a lung abscess (a pocket of infection) or other serious organ damage — a surgical procedure may occasionally be needed. This would be a decision made by specialists in a hospital setting.

Hidup dengan keadaan ini

Recovering from COVID-19 looks different for everyone. Many people feel back to normal within one to two weeks. Others — particularly those who were more seriously ill — may find that fatigue, brain fog (difficulty thinking clearly or concentrating), breathlessness, or other symptoms linger for weeks or even months. This prolonged experience is known as Long COVID or Post-COVID Syndrome. Living with Long COVID can be challenging, but support is available. Pacing yourself — doing a little, resting, and gradually building up your activity — is one of the most recommended approaches. Avoid pushing yourself too hard too soon, as this can worsen symptoms.

Tip gaya hidup

• Pace your activity — start small and increase gradually, listening to your body
• Prioritise sleep and establish a regular sleep routine
• Keep a daily symptom diary to track what makes you feel better or worse
• Accept help from family, friends, or community support services when you need it
• Communicate openly with your employer about your recovery if symptoms are affecting your ability to work
• Avoid alcohol and smoking, as both can slow your recovery and worsen respiratory symptoms
• Attend any follow-up appointments recommended by your healthcare provider
• Connect with others who have had similar experiences — peer support groups can be incredibly helpful

Diet dan senaman

Good nutrition supports your immune system and helps your body heal. Focus on eating a balanced diet with plenty of fruits, vegetables, whole grains, and protein-rich foods like beans, eggs, fish, and lean meat. Stay well hydrated throughout the day. If your appetite is poor, try smaller, more frequent meals. As you recover, gradually reintroduce gentle movement — short walks, light stretching, or gentle breathing exercises can help rebuild your strength. Avoid intense exercise while you are still in the acute phase of illness or if you have any chest pain or breathlessness. Ask your healthcare provider or a physiotherapist (a specialist in movement and rehabilitation) for personalised guidance on returning to exercise.

Kesihatan mental dan kesejahteraan emosi

It is completely natural to feel anxious, low, or overwhelmed during and after a COVID-19 illness. Isolation, worry about your health, financial concerns, and the physical toll of the illness can all affect your mental wellbeing. Some people experience post-viral depression (low mood following a viral illness) or anxiety. Long COVID can also take a significant mental health toll. Please know that you are not alone in this. If you are struggling emotionally, reach out to a friend, family member, or healthcare professional. Mental health support — including talking therapies (speaking with a trained counsellor or therapist) — can make a real difference. If you are ever in crisis or having thoughts of harming yourself, please contact a crisis support line or go to your nearest emergency department immediately.

Pencegahan

Yes — there are effective steps you can take to significantly reduce your risk of catching COVID-19 and passing it on to others. No single measure is 100% effective, but combining several approaches gives the best protection. The most important steps are staying up to date with vaccinations, practising good hand hygiene, improving ventilation indoors, and staying home when you are unwell. Wearing a well-fitting mask in crowded or poorly ventilated spaces can also reduce risk, particularly for those who are more vulnerable.

Vaksin

Vaccination is the single most powerful tool we have to protect against severe COVID-19 illness, hospitalisation, and death. COVID-19 vaccines work by training your immune system to recognise and fight the SARS-CoV-2 virus so that if you encounter it, your body is ready to respond quickly. Multiple safe and effective vaccines are available around the world, reviewed and approved by national health authorities. Booster doses (additional vaccine shots given after your initial course) are recommended for many people, especially older adults and those with underlying health conditions, because immunity can reduce over time and the virus continues to evolve. Talk to your healthcare provider about what vaccines and boosters are recommended for you in your area. The UK NHS provides up-to-date guidance on COVID-19 vaccination programmes at nhs.uk.

Program saringan

Testing is widely available in most countries and plays an important role in preventing spread. If you develop symptoms, testing promptly and isolating (staying home and away from others) if positive helps protect those around you. Some countries offer regular testing programmes for certain groups. Check your local health authority's guidance for the most current testing recommendations in your area.

Komplikasi

Jika tidak dirawat

• Pneumonia — a serious infection of the lungs that makes breathing very difficult
• Acute Respiratory Distress Syndrome (ARDS) — a life-threatening condition where the lungs cannot provide enough oxygen to the body
• Blood clots — COVID-19 increases the risk of clots forming in the legs, lungs, heart, or brain, which can cause a stroke or pulmonary embolism (a clot in the lungs)
• Heart inflammation (myocarditis or pericarditis) — swelling of the heart muscle or the tissue surrounding it
• Kidney injury — the virus can affect how well the kidneys filter the blood
• Neurological complications — including brain fog, difficulty thinking clearly, nerve pain, and in rare cases, encephalitis (inflammation of the brain)
• Long COVID (Post-COVID Syndrome) — ongoing symptoms lasting weeks or months after the initial illness, including fatigue, breathlessness, and cognitive difficulties
• MIS-C (Multisystem Inflammatory Syndrome in Children) — a rare but serious inflammatory response seen in some children following COVID-19 infection
• Worsening of existing health conditions

Pandangan jangka panjang

The outlook for most people with COVID-19 is genuinely positive. The vast majority of people — especially those who are vaccinated and otherwise healthy — recover fully from the illness without lasting complications. Even for those who experience Long COVID, many people do see gradual improvement over time with the right support and care. Medical understanding of COVID-19 has advanced enormously since 2020, and healthcare providers now have much better tools to support patients through all stages of illness. If you are struggling, please reach out — there is real help available, and you do not have to manage this alone.

Cari sokongan

Organisasi antarabangsa

• World Health Organization (WHO) — COVID-19 Information and Resources ↗
• Long COVID Support — International Patient Community ↗
• COVID-19 Mental Health Support — Mind (international resources) ↗

Organisasi tempatan

• NHS — COVID-19 Guidance and Support ↗ · United Kingdom
• NHS — Your COVID Recovery (Long COVID rehabilitation programme) ↗ · United Kingdom
• Centers for Disease Control and Prevention (CDC) — COVID-19 ↗ · United States
• Australian Government Department of Health — COVID-19 ↗ · Australia
• Government of Canada — COVID-19 ↗ · Canada

Talian bantuan

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