About 144,000 people a day are catching it and then feeling unwell.
If you have a sore throat, runny nose and a headache there is a good chance it will be Covid, warn UK researchers.
The UK reported 106,122 new Covid cases on Wednesday - exceeding 100,000 on a single day for the first time. But a massive wave of infections would still mean many people needing hospital care, as well as lots of doctors and nurses being off sick with Covid.
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