Contact tracing

The health secretary will have to stay at home until Sunday.
Announced on the eve of the Christmas break, schools have been left hanging as they wait for the details on the education secretary's plan.
Here's what we can learn from contact tracers in the US on which social spaces have the highest risk.
The under-fire service finally hit its own 80% target for the first time in more than six months last week.
Pupils will also be tested daily if they have been in close contact with a positive case, in a move Gavin Williamson called a "milestone".
"Game changer" proposal from Test and Trace service will cut quarantine from 14 days to zero.
Under-fire service finally exceeds the 80% target that experts says is needed to make the system viable
Under-fire service abandons attempts to reach young people whose parents have already been spoken to.
Tory peer also says it is “impossible” to say if she would ever apply for NHS chief executive job.
The latest cluster of infections in South Australia has been linked to a returned traveller from the UK.
Under-fire service failed to reach 113,000 people known to have had close contact with Covid cases.
Users of Android devices have reportedly been among the worst hit.
He's the vice president's second aide to contract the virus.
National restrictions were not inevitable, but because of the government’s incompetence they now are, writes Rachel Reeves MP.
A follow-up message will now be sent to reassure those worried by alerts. But “ghost notifications” cannot be stopped.
"People who know their own community are bound to be better than Whitehall or national contact tracers", communities secretary Robert Jenrick admits.
Service run by Dido Harding goes backwards once more on key target need to make system viable.
The service is going backwards on the key target needed to make it viable. Just one in six tests were turned around within 24 hours.
"It records the minimal amount of personal data and most of the data is only recorded on the phone," says one cyber security expert.
The NHS Covid-19 app will be released this week but questions remain unanswered about how it has performed during testing.