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COVID-19
COVID-19 is a viral infection caused by the SARS-CoV-2 coronavirus. Most people have mild symptoms, but it can be serious in older adults and those with other conditions.
Causes & risk factors
- Infection with the SARS-CoV-2 virus
- Spread through respiratory droplets and close contact
- Touching contaminated surfaces then the face
- Crowded, poorly ventilated indoor spaces
- Higher risk if unvaccinated or immunocompromised
Common symptoms
- Fever
- Cough
- Sore throat
- Tiredness
- Breathlessness
- Loss of taste or smell
Tests & diagnosis
- Rapid antigen test (RAT)
- RT-PCR swab test
- Blood oxygen (pulse oximetry)
- Chest X-ray if severe
Treatment & management
- Rest, fluids and fever/pain relief for mild cases
- Isolating to avoid spreading the virus
- Monitoring oxygen levels at home
- Antivirals for those at higher risk
- Hospital oxygen or care if breathing worsens
When to see a doctor urgently
- Severe breathlessness or oxygen level below 94% — call your local emergency number now
- Chest pain, confusion or blue lips — emergency
- Symptoms rapidly worsening, especially if high-risk
- Unable to keep fluids down or very drowsy
Not a diagnosis. MedDroid gives general educational information about covid-19. It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Do vaccines still help?
Yes. Vaccines lower the risk of severe illness and hospitalisation, especially for older and high-risk people. Boosters may be advised.
What is long COVID?
Some people have lasting symptoms like fatigue, breathlessness or brain fog for weeks or months after infection. See a doctor if symptoms persist.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.