Omicron symptoms: The main sign of a 'breakthrough infection' in the fully vaccinated

The analysis identified a number of cold-like symptoms associated with Omicron.

The top five symptoms reported in the ZOE app were:

  • Runny nose
  • Headache
  • Fatigue (either mild or severe)
  • Sneezing
  • Sore throat.

The discovery prompted Professor Tim Spector, lead scientist on the ZOE COVID Study app, to issue important public health advice.

The professor said at the time: “To help us slow the spread, my advice continues to be; avoid gathering indoors, and, if you are meeting up with people, check everyone is free of cold symptoms, test yourself just before and get fully vaccinated.”


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