This has been part of the standard simptoms list in the UK for a while, I've even heard it described as more reliable than a fever/temperature. The confirmation

This has been part of the standard simptoms list in the UK for a while, I've even heard it described as more reliable than a fever/temperature. The confirmation for it came in part from the work done by kings College London using data from the Covid Symptoms Tracker app, which has had several million users logging how they feel every day since about April. I got a test through them (negative thankfully) when I came down with something and reported it in the app.