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The Head of The Test -and-Trace program has been questioned about the risks of false-negative coronavirus-findings of a Committee of MPs.

Dido Harding was asked at the health select committee, why the people tested do not return again and again to ensure that you don't have coronavirus.

MPs belongs to 20% of the tests can falsely suggest that someone is not infected.

Earlier, Boris Johnson said the tests are processed within 24 working hours, by The End of June.

in the question of the delays that Mr Hunt, the PM said the 24-hours-to take account of the goal of "insurmountable problems" such as post -.

But He Said : "I can commit myself to get to him now, all the tests turned around in 24 hours until The End of June, except for difficulties with the post-tests or insurmountable problems. "

The tests include a nasal and throat swab to look for the genetic material of The Virus . It detects active coronavirus infection, as recovered from Covid-19 can't tell whether someone has.

the positive Test is to allow you to keep track of contacts, and to determine whether the NHS staff can go Back To work.

But the smear tests can be carried Out , do not deliver false negative Results , what is on someone suggesting coronavirus, if you are actually positive.

This could be because the quality of the swab, the time of The Test or questions in the laboratory.

During the Committee hearing, Mr Hunt cited, suggesting a 20% negative Results could be wrong.

the Baroness Harding of mind said it estimates the proportion of false-negative Results ranged from "two and 20-odd percent".

she added that the question of why those with a negative result, were not tested again "a medicine/science in question", and it was Say to take your job "chief medical officers' guidance".

A Department of health and social care spokesman said: "The Test is reliable and effective. As with all diagnostic test, however, there is always the small possibility of a false-negative or false-positive Results . "

'Best guess'

The hospital consultants and specialists Association (HCSA), which represents hospital doctors, had previously called for NHS staff to be tested More Than once.

Dr. Claudia Paoloni, The Union 's President, said, citing a negative result "runs the risk of infecting patients and staff".

Prof Nicola Stonehouse, a virologist at the University of Leeds, said people needed to be aware that a test is not "good enough".

It is necessary, several tests, She Said , and they needed to be separated by 72 hours.

Currently, a negative test tells the people to return to work, if you have no symptoms, and means of contact-tracing is not triggered.

testing and tracing is clearly essential to the UK to get Back To some level of normality.

to work For you to be successful, two basic things are needed, about everything.

people need to trust, and it needs to work effectively. The two are of course linked.

And, unfortunately, in two points of The Jury .

The Service - as Baroness Harding points Out - only Six Days old.

It deserves a bit of time to bed.

But, pretty soon, The Public must be given information on how it works and whether people are to isolate the compliance with the requirements.

This is something that officials are reluctant at The Moment until they are presented properly validated the Numbers - understandable, given the UK Statistics Authority has criticised The Way were test Numbers .

There are also people who come to us for testing needs. Polls show there are approximately 8,000 new infections per day in the community, but The Testing system is picking up less than 2,000 of them - and this includes those who are diagnosed, in care homes and hospitals.

If enough people don't come forward for a test in the First Place , tracing contacts with future outbreaks, is doomed to fail.

GP, diagnostic tests, and researcher, Dr. Jessica Watson told BBC Radio 4 's More or Less program the "best guess" was about 70 Out of 100 people who have the coronavirus, would be picked up by The Test program.

factors, which contain the result, tested at what point in their disease someone, how good a sample is taken, with no problems with the processing of tests, She Said .

Public Health England is expected to publish an evaluation of its tests, used for hospital patients and some employees, This Week .

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Source of news: bbc.com