What should you know about coronavirus meter?

The phrase may refer to an online symptom checker, a risk score, or a home device such as a thermometer or oxygen monitor. These tools measure limited information. A thermometer records body temperature, while an oxygen monitor estimates oxygen saturation and pulse; neither identifies SARS-CoV-2 on its own.

An online score can miss important details, including how quickly symptoms changed, pregnancy, age, medicines and long-term conditions. COVID-19 symptoms may include cough, fever, fatigue, headache and feeling generally unwell, but those symptoms also occur with other infections.

Treat a meter as an aid to observation rather than a diagnosis. Record symptoms, temperature and any readings with the time and your activity, then share the pattern with a clinician if you need advice. Use a device according to its instructions, keep still during a reading, and repeat an unexpected result after checking the sensor and your hands are warm.

Do not delay care because a reading or score looks reassuring. Follow local advice about testing and reducing contact when you are unwell. More information is available on COVID-19, Cough and Fever.

Seek urgent help for severe breathing difficulty, chest pressure, confusion, inability to stay awake, or blue or grey lips or skin. Get medical advice if breathlessness is new, symptoms are worsening, fever continues, or a home oxygen reading is repeatedly lower than your clinician has advised for you. Pneumonia is one possible cause of serious respiratory symptoms.

Ask what device is suitable for your situation, how to take a reliable reading, and which result should trigger a call. Discuss whether testing for COVID-19 is appropriate and what follow-up you need if fatigue or other symptoms persist.