Covid-19 research appeals for more elderly supporterspublished at 13:19 British Summer Time 24 April 2020
Some of the UK's largest charities are to help the developers of a Covid-19 Symptom tracker app get the over-70s to use it.
So far more than 2.5 million participants have downloaded the NHS-endorsed app created by King's College London and health science company ZOE.
But app designers want more over-70s and people with pre-existing health conditions, such as heart disease, diabetes and asthma, to sign up as they are considered most at risk from Covid-19.
Claire Steves, clinical senior lecturer at King's College London, said they would help developers "capture more data from people who may be less able to use an app".
Since the app was launched on March 24, the day after the nationwide lockdown was introduced, developers have found fewer older people logging in.
She said it was important to get the over-70s and those with pre-existing conditions more involved as Covid-19 symptoms may be different.
"They might present with other things, like a confusional state or maybe diarrhoea, abdominal symptoms.
"If we can really prove that and know that and share that with everybody then potentially that could be really important in reducing spread from the virus."
She said understanding such symptoms could also help with the tackling the presence of Covid-19 in care homes.