Edging towards a year since the first coronavirus pandemic took Britain hostage, a voluminous amount of data has now been collated on the devastating disease. Thus, a more nuanced observation of symptoms can be achieved.
Millions of people have shared their experience with Covid on the COVID-19 Symptom Study.
The not-for-profit organisation was launched in March 2020, and has been collecting information ever since.
As a result, a new “scientific understanding” has emerged around the different symptoms the virus can cause.
The team discovered that a headache and fatigue are two early indicators of a Covid infection.
Aside from the classic triad, there are common repairs of a: sore throat, loss of appetite, and shortness of breath.
Delirium was noted as a common symptom in older people, and rashes were seen in around eight percent of Covid cases.
The investigators said: “The rate of asymptomatic infections may be lower than we think.”
Adding, “Especially if we look at a wide range of reported symptoms over the entire infection period.”
Basing their knowledge on current scientific studies, estimates of people with asymptomatic Covid vary wildly from five to 96 percent.
The team suggested many clinical trials focused on the classic triad of symptoms and/or symptoms experienced on the day of a Covid test, instead of the entire infection period.
The Covid Symptom Study – launched by health science company ZOE – asked participants who reported their symptoms in the first wave of the pandemic to take an antibody test.
The results demonstrate that one in four (25 percent) who didn’t have any of the classic triad of symptoms had Covid antibodies.
This means that they had been infected by SARS-CoV-2 – the coronavirus that causes the Covid disease, and displayed other non-classic signs of infection.
Looking more closely at the data, only one in five (20 percent) who reported no symptoms of the disease at all had tested positive for Covid.
“Our estimate of truly asymptomatic cases is lower than many other studies,” researchers commented.
“[This is] because we looked at a wide range of symptoms over the entire course of infection.”
However, at the time of the study, the researchers didn’t ask questions about skin rashes – a Covid symptom discovered much later.
Thus, they concluded that their rate of asymptomatic cases (20 percent) “may still be an overestimate”.
Coronavirus variants have been causing alarm, with a new strain identified in Brazil.
Another, the super contagious B117 variant in the UK, contributed to the enforced national lockdown.
Thus, the more information collected on symptoms of each variant, the better our understanding of the viruses grow.
If you’d like to take part in the research, you can download the Covid Symptom Study app on a smartphone.
The investigation is led by ZOE co-founder Tim Spector, a professor of genetic epidemiology at King’s College London.
Anonymised data will be shared with Guys & St Thomas’ Hospitals, data scientists at ZOE Global Ltd and perhaps the UK National Health Service (NHS).
The aim of the Covid Symptom Study is to better understand symptoms of the disease, identify high risk areas in the country, and identify who is at most risk of the disease due to linked health conditions.