COVID-19
Based on CDC and WHO guidance, checked against those sources on Oct 12, 2026. Educational information only — not a diagnosis or a substitute for a licensed healthcare professional.
Common symptoms
- Fever or chills
- Cough
- Shortness of breath
- Sore throat
- Congestion or runny nose
- Tiredness
- Muscle or body aches
- Headache
- New loss of taste or smell
- Nausea, vomiting or diarrhea
Symptoms usually appear 2–14 days after exposure. These symptoms can also be caused by other illnesses.
Seek emergency care for
- Trouble breathing
- Persistent pain or pressure in the chest
- New confusion
- Inability to wake or stay awake
- Pale, gray or blue-colored skin, lips or nail beds (depending on skin tone)
When to contact a healthcare professional
- As soon as symptoms start if you are 65 or older, pregnant, have a weakened immune system or a chronic condition — treatment works best when started early.
- If symptoms get worse instead of better, or last longer than expected.
- If you are unsure whether you need care.