cathyandclaire
I missed your post earlier but I had to re-read it in the report:
Very high rates of asymptomatic cases from that ONS data:
While those who have symptoms are more likely to test positive than those without symptoms, out of those within our study who have ever tested positive for COVID-19, 29% reported any evidence of symptoms at the time of the visit or at either the preceding or following visit
From here www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/conditionsanddiseases/bulletins/coronaviruscovid19infectionsurveypilot/5june2020
I didn't quite understand this, as it sounds like it's saying 71% of positive-testing people don't have symptoms. The relevant section is Figure 8 of the report and the text underneath.
"Additional analysis we have considered looks at whether people who tested positive also reported symptoms. While those with symptoms are more likely to test positive for COVID-19 than those without symptoms, this analysis shows that out of those who have ever tested positive, the percentage who reported having symptoms at the time of the test was relatively low."
"Out of those people that tested positive for COVID-19 over the study period, only 22% (95% confidence interval: 14% to 32%) reported experiencing one or more of the various symptoms at the time of their test. Out of those who reported testing positive, 29% (95% confidence interval: 19% to 40%) reported experiencing symptoms at any point in the period around testing positive. This was at the time of the visit or at either the preceding or following visits.
This analysis is based on 88 individuals in the sample who tested positive for COVID-19. This is a very small denominator, meaning the confidence intervals are wide. Additionally, with such a small number of cases included in this analysis, if any of these are false-positives this would have a large effect on the results."
"Notes for: Characteristics of people testing positive for COVID-19"
<span class="italic">We asked individuals to self-report whether they worked in patient-facing healthcare or resident-facing social care roles; where that information was missing or uncertain, we used the other information they gave us about their occupation.</span>
<span class="italic">The symptoms respondents were asked to report were: fever, muscle ache (myalgia), fatigue (weakness or tiredness), sore throat, cough, shortness of breath, headache, nausea or vomiting, abdominal pain, diarrhoea, and loss of taste or loss of smell.</span>
Here we compare symptoms from the first time a person tested positive or, if they have never tested positive in the study, from their most recent test."