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THE GOVERNMENT IS to increase the use of antigen tests, advising that they be used by fully vaccinated people who are deemed to be close contacts of a confirmed Covid-19 case, but who have no symptoms.
Taoiseach Micheál Martin confirmed this afternoon that antigen tests will have an “enhanced role” as part of a series of new Covid-19 measures announced today, and that tests will be sent to symptomless fully vaccinated close contacts of confirmed cases.
“A more wider use of antigen tests is certainly on the cards,” the Taoiseach said in response to a question from The Journal.
Tánaiste Leo Varadkar said that there would be more information on how exactly this would work “very soon”.
PCR tests are the type of test used to confirm that someone has Covid-19 – this type of testing is done in a laboratory, and can take up to 48 hours to give a result.
Antigen tests – or ‘lateral flow’ tests – give a result quicker than a PCR test, usually within 10-15 minutes, but are not as accurate – particularly for those without symptoms.
‘Damning’ approach to antigen tests
NPHET has recommended to Government that the HSE should implement a programme of Covid-19 antigen testing, and get a PCR confirmation in the event of positive cases.
It also recommended that the Rapid Testing Expert Advisory Group be requested to provide a view on voluntary self-testing by asymptomatic individuals who plan to engage in high-risk activities, such as going to nightclubs; and that the Group be requested to examine rapid testing as a part of the Covid-19 pass for those for whom, on medical grounds, it is not been possible to get fully vaccinated.
Cabinet met early this morning, and agreed on this series of measures, including that antigen tests should be sent to vaccinated asymptomatic people who are considered close contacts of positive cases.
Opposition TD and Aontú leader Peadar Tóibín criticised the Government’s approach to antigen testing, which he said was used across Europe as a means of stopping Covid spreading.
“It saves lives, ill-health, allows business to properly function and is non-discriminatory. Yet this government has resisted it. This is damning and it shows that complete failure of the government to protect society”.
“Antigen testing is still aspirational in today’s announcement. It states that the HSE ‘should’ implement a programme of Covid-19 antigen testing. This only applies to people who are identified as fully vaccinated close contacts. This is a very limited number people”.
Currently, antigen testing is being piloted in seven college campuses this autumn: students test themselves twice a week at home, and can upload their results online using the HSE Report Antigen Result website.
Antigen testing has also been used at high-risk sites, such as meat processing plants.
In England, each household can order one pack of antigen tests a day, and each pack contains seven antigen tests.
Antigen testing: will we, won’t we?
Taoiseach Micheál Martin has said previously he would like to see more widespread use of antigen testing as Ireland reopens, but NPHET have shied away from recommending that so far, arguing that the tests are not as good as PCR tests.
“It’s not a skepticism of antigen testing, it’s the absence of evidence to show that they work well enough to recommend their use,” Chief Medical Officer Dr Tony Holohan said at a NPHET briefing in July.
But there have been increased calls in recent weeks for antigen testing to be used more widely to help suppress the current increase in Covid-19 cases, including by teachers’ unions to help reduce the number of Covid-19 cases in schools.
Professor Mary Horgan, president of the Royal College of Physicians of Ireland and a member of the Rapid Testing Expert Advisory Group assembled to look at the use of rapid antigen testing to reopen Irish society, argued that antigen tests pick up highly infectious cases quicker:
“There’s no debate about PCR tests being more sensitive, but antigen tests pick up infectious people so people who are shedding high amounts of the virus at that point in time that the test is done,” she said.
“They’re the people that we need to detect, and really it is case detection, so that they’re identified before they leave home and go to the workplace or go to college so that they can stay at home and go into our very successful testing strategy that we have at the moment.”
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But I thought they were the equivalent of snake-oil according to Philip Nolan?
@John Duggan: They miss nearly half of infections when used in the community (self-testing rather than administered by a professional). This is because the virus often hides at the back of the throat and nose, it’s hard to get a proper sample.
“The two relevant field studies recruited people from NHS test and trace centres, mainly those with symptoms. Detection rates (sensitivity) were 73% (95% confidence interval 64%to 85%) when tested by skilled NIHR research nurses and 79% (73% to 85%) when tested by Porton Down laboratory scientists.
But testing by test centre employees (following written instructions) achieved sensitivity of just 58% (52% to 63%). This is important, because it is closest to the circumstances for staff, student, visitor, and community testing.”
Lateral flow tests cannot rule out SARS- CoV-2 infection
https://www.bmj.com/content/bmj/371/bmj.m4787.full.pdf
@David Jordan: sounds like it needs better instructions then. Be grand. They are used all over Europe.
@David Jordan: Catching half is better than catching none. Think of how many asymptomatic people walking around could have been tested and found positive through antigen testing instead of going around spreading it. Maybe people would use cop on and test themselves twice to be double sure if they were widely available. That would improve your stats for the test working. I was at a wedding at the weekend. 2 tests done before and 2 tests done since…… Could have saved alot of lives over the past year and reduced alot of spread had it been widely used. Any tool to help the fight should have been used. The danes use them widely, go check how well they did against the delta wave compared to us.
@Paul Hedderman: doesn’t work on asymptomatic people…
@Edmund Orlando: that’s not true.
@Edmund Orlando: Why bother lying?!?! Excerpt from a HSE study on antigen tests. Google it!…….
“Among asymptomatic workers in meat processing plants with positive RT-PCR results for SARS-CoV-2, 51.9%
had a positive test with the validated nasal ADT test (i.e. a test sensitivity of 51.9%). For use with asymptomatic
individuals, the sensitivity of the Abbot Panbio COVID-19 Ag Rapid Test (Nasal) even taking into account higher
viral RNA levels, is below the minimum requirements set out by WHO and ECDC.”
I wonder how well it will actually work? After all, I can just imagine some the people I know trying to test themselves, I probably would not be much better my self
“Antigen testing has also been used at high-risk sites, such as meat processing plants.”.. but yet still no mention of using them in nursing homes for screening of visitors/staff. I feel like I’m in a bad dream that keeps repeating itself.
Where to get them? Are the Tesco or Aldi test kits worth it? Or is there a more accurate kit?
@Finn Faulkner: if you can get to the north or know anyone in the UK they can get them for free in pharmacy’s and supermarkets. They come in a pack of 5 or 7 . We got sent a load. Handy to have but note a relative was symptomatic and tested everyday for 4 days before showing a positive result. We all then tested and all asymptomatic. One of the kids tested positive straight away the other was negative but later tested positive on a pcr then a few days later showed positive on the antigen. We would not have done any tests only my relative continued to test each day. So while anitgens are a good buffer if you are symptomatic you should still isolate and continue to test. If you are a close contact the same applies until you are cleared by pcr. If you are visiting vulnerable people take regular tests like twice a week.
None of these tests actually work the last thing I’ve read from the cdc have confirmed the pcr tests have never been accurate, the inventor of the test has said a drop of lemon juice will give a positive on a pcr test, so these tests are telling people their sick and in fact their not , so how much longer are they going to be holding people to ransom with these tests.
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