“Given the numbers of people affected, it’s important that we continue to support them at work, at home, and within the NHS.”
Slightly more women than men log onto the ZOE app, and fewer people from the most deprived areas, so the samples are not fully generalisable to the UK population. But the researchers said the samples were similar in both study periods, allowing comparison.
The researchers said the strength of the study was the prospective logging of a wide range of symptoms. Limitations included no direct resting of infectious variants and no objective measures of illness duration.
There were also insufficient data to estimate the odds of long Covid in unvaccinated people, and the study did not estimate effects in children.