How long has it been since COVID started?

The date COVID-19 was first identified describes the beginning of recognition, not the start of every person’s infection. SARS-CoV-2 has continued to circulate and change, so an illness today may differ from an earlier infection. COVID-19 can cause respiratory symptoms, tiredness, loss of smell or taste, and other effects. Symptoms that continue after the initial illness may be part of Long COVID, but they can also have another explanation.

Write down when your symptoms began, whether they improved, and which problems remain. This is more useful for care than counting from the first reports of COVID-19. Follow local advice if you have a new infection, reduce close contact while unwell, rest, and drink enough fluids. Contact a clinician if symptoms affect work, sleep, eating, concentration, or movement, especially if you have other health conditions.

Seek urgent help for serious breathing difficulty, chest pain, confusion, fainting, or difficulty staying awake. Arrange a routine assessment for persistent fatigue, difficulty concentrating, joint pain, low mood, or changes in smell and taste. A clinician can review the timing and pattern, check for other causes, and discuss suitable support. Do not use the age of the pandemic as a guide to whether a symptom is safe to ignore.

Which part of my symptom timeline matters most for diagnosis? Could my ongoing symptoms fit Long COVID or another condition? What monitoring or follow-up would be useful?