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I don' t think SG will ever use this, even in a mass testing scenario. We small, so easy for us to do PCR
Papason883883 ( Date: 27-Apr-2020 10:19) Posted:
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Actually, yes, it' s called a screening test and it' s quite common.
You take a faster / cheaper / less painful / less accurate test to see if you might need a more expensive / more painful / longer test. Cannot get headache then immediately get brain biopsy la haha
For covid in the US, you take the faster rapid test, if suspected case, then send to quarantine area to wait for between 4 hours to 2 days for your PCR tests to get back to you.
You take a faster / cheaper / less painful / less accurate test to see if you might need a more expensive / more painful / longer test. Cannot get headache then immediately get brain biopsy la haha
For covid in the US, you take the faster rapid test, if suspected case, then send to quarantine area to wait for between 4 hours to 2 days for your PCR tests to get back to you.
WL123456 ( Date: 27-Apr-2020 10:07) Posted:
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https://www.google.com.sg/amp/s/www.nbcnews.com/news/amp/ncna1167376
This swab method is what South Korea use. Not this... so don?t think about a mass testing dream in Singapore with Biolidics. Happy that SGX query. Finally they work justice.
And Singapore may not have so much capacity to house community no symptoms cases. Unless turn bad! Don?t dream
This swab method is what South Korea use. Not this... so don?t think about a mass testing dream in Singapore with Biolidics. Happy that SGX query. Finally they work justice.
And Singapore may not have so much capacity to house community no symptoms cases. Unless turn bad! Don?t dream
i gamble. buy 430
I have personal agenda because i hate companies that misrepresented themselves as I was once a victim of misrepresentation. I am not sure if you like it but some people likes to be cheated. And I have posted here in SJ for a long time and all knows I have an agenda against companies which misrepresent, that?s to prevent more innocent retailers from getting sucked in. We shall see what eventually happens to the share price of this company. Marketing an antibody test kit with a huge Covid19 test kit infront of the box is sure scammy.
NT7979 ( Date: 27-Apr-2020 10:12) Posted:
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Biolidics unlikely to be affected by allegations against Covid-19 test kit distributor, say directors
http://www.straitstimes.com/business/companies-markets/biolidics-unlikely-to-be-affected-by-allegations-against-coronavirus-test
overly bashing make you lose creditbility... and shows that you have personal agenda..
By the way Serology A.K.A Antibody testing is listed as a method of COVID19 testing in wikipedia
https://en.wikipedia.org/wiki/COVID-19_testingWL123456 ( Date: 27-Apr-2020 10:00) Posted:
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When you labelled it Covid19 test kit, that?s misrepresentation because there?s only 3 of them that is accurate and approved and millions of others which are not. They should label it anti body test kit and not Covid19 test kit. And to me that?s serious misrepresentation. You look at their test kit and it?s so obvious they labelled Covid19 anti body test kit. Furthermore, a product from China in which is marketed by Singapore but not even used by Singapore. You think others will want to use it? Let?s face it, there?s no future for this test kit and Biolidics just wasted their money.
john76 ( Date: 27-Apr-2020 10:07) Posted:
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Many still trust that SJ Number 1 BULLSHITTER EASY EASY SIP SIP KOPI-FLAVOURED URINE, CLAIMED he trade 24 hrs all day, knows CB bosses very well(if i remember correctly he claimed he knows Clearbridge bosses very well) FUKING JESMAR (who has now gone into hiding like a FUGITIVE)! Lolllll
WL123456 ( Date: 27-Apr-2020 10:00) Posted:
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Hahah, so when you got dengue fever but your body show higher level of antibodies, does it mean you have dengue fever or Covid19? Makes things worse because now you have to go for further testing to confirm it right? Will you use this type of test kit??
john76 ( Date: 27-Apr-2020 10:05) Posted:
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Here it is: https://www.facebook.com/permalink.php?story_fbid=1417843458403484& id=100005335308340
kuanyong1109 ( Date: 27-Apr-2020 10:00) Posted:
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This stock is toast for now.
Retailers kena con chasing higher high...:(
In the first instant, this so called test kit is not use here.
humbleman ( Date: 27-Apr-2020 09:16) Posted:
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Lol accumulate cheap? I can assure you those who dare accumulate on this type of company will suffer later. You still dare to trust them with your money? They hang goats head but sell dogs meat. Sell antibodies test kit but claim it is a Covid19 test kit. Soon media in other countries will pick it up. Or maybe Aytu will turn around and sue biolidics for misrepresenting their products? Hope someone come up with a copy of the agreement. The word antibody test kit and Covid19 test kit now makes a difference. If you are buying, good luck to you.
john76 ( Date: 27-Apr-2020 09:54) Posted:
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anylink to show hoching comment
brchkho1 ( Date: 27-Apr-2020 09:54) Posted:
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DBS vickers still can buy and sell directly lol no wonder ahaha
john76 ( Date: 27-Apr-2020 09:54) Posted:
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What kind of good news? Please see Ms Ho Ching' s comment in her FB yesterday on the test kit.:
" Hello, everyone!
There are tests, and there are tests.
While test kits for antibodies may be faster than the swab and PCR approach, they are not meant to test for covid virus itself.
All such antibody test kits should NOT be marketed as covid rapid test kits. That is very misleading.
The presence of an antibody only tells us whether we have had been infected. It is a lag indicator of infection.
And depending on which type of antibody, it tells of the different phases of recovery or infection fighting.
And some antibodies may appear a week after infection, while others appear later.
Or it may also take longer than 2 weeks to mount a response with enough antibodies to be detected.
This can vary from patient to patient.
This is like fever - old folks may mount only a very mild fever to an infection, when a younger person may mount a fever more strongly and clearly.
So antibody test kits may be marketed as antibody test kits, with info on accuracy, sensitivity and specificity. They should not be marketed as rapid covid-19 test kits.
Speed with low accuracy or poor specificity is worse than useless.
What is specificity?
It means the test picks up the antibody to covid-19 specifically, and not the antibody to other human common cold coronaviruses, to dengue, or to other viruses or bacteria.
Otherwise, we may mistake a dengue antibody for a covid antibody for instance. Am exaggerating to make a point, of course, bcos no serious test kit company worth their salt will make such a basic mistake.
What is sensitivity?
This is the ability of the test to pick up low amounts of antibodies or viruses.
For instance, the typical swab and PCR method can take a short or a long time to do - a short time means we multiply the virus bits a few cycles in a RT-PCR and thus have X amount of virus bits that we may not detect, and so this may be useless as a mainstream test kit a long time means we go through many more cycles to generate many more bits of the virus, and thus we can pick up the virus easier, but if we do this for too long, we lower our throughput capacity.
So a test may pick up say 100 viral bits vs another which needs 1000 viral bits, while a 3rd needs just 20 viral bits.
And each will require different time to do so, measured in hours under the RT-PCR approach.
So this is a case of speed vs sensitivity.
This kind of trade off often happens for biological type testing.
There are alternative technologies which may be faster, but none are available in commercial quantiites yet - they are still being developed, or are being validated.
Finally, the accuracy.
This means when we have a reading of Y, we know that the real number could range from Y-Z to Y+Z.
To complicate matters, sometimes we have Y-Z1 to Y+Z2. Hee! But let&rsquo s keep to a single Z for simplicity.
If Z is a small percentage of Y, we know we can rely on the Y to make a decision.
But if Z is bigger than Y, then we pretty much can ignore Y of a certain value.
Take the ATP machine - we use this as a first line check of the amount of living microbial organisms say on a door knob.
Suppose the accuracy Z is 250, and the machine gives a Y reading of 22. That doesn&rsquo t mean that we are really at 22. It means the true number can be anywhere from 0 to 250.
So we should then use the 250 mark as the pass/fail, rather than try to aim to be 0 or 50, etc.
The machine just doesn&rsquo t give us that kind of accuracy to make these low numbers meaningful.
So media reports on all test kits should ask for their test data and share those test data as a way to educate our people fully, and not get carried away by the focus on speed as if that is the be all and end all of test kits. Or ask for their user base.
P.s.
I don&rsquo t have the info on the Biolidics off the top of my head, and have no specific information on their test kit performance.
But it would be good if Biolidics or any other test kit producers share these information with the media.
It is also useful for mainstream media to go get medical or research specialists to help them interpret test kit specs, or go get a tutorial quickly.
Under today&rsquo s emergency situation, many health authorities may give provisional status without requiring the full jing-bang of validation and trials that they would normally require. So waving the names of this or that authority is not the way to go.
And my apologies to both Biolidics and Straits Times for using their story to hang this PSA peg to alert folks on how we should look at news on this or that superduper 2 minute or 10 minute test kit.
Thank you, all, for this opportunity to share some thots and observations.
P.p.s.
A recent NYT article just reported that of the 14 antibody tests, only 3 gave consistently reliable results.
The rest didn&rsquo t perform as advertised.
Layman translation - the rest were junk.
Even the best 3 had flaws.
Only one didn&rsquo t have false positives.
Why does false positives happen?
One reason has to do with specificity as discussed earlier.
If a test cannot be very very specific to covid-19, and recognises something else as covid-19 antibody, we will end up as a false positive. That is a very clear no-no.
Others may have very high false positives - which means they are junk tests.
More on other points in the NYT article later."
" Hello, everyone!
There are tests, and there are tests.
While test kits for antibodies may be faster than the swab and PCR approach, they are not meant to test for covid virus itself.
All such antibody test kits should NOT be marketed as covid rapid test kits. That is very misleading.
The presence of an antibody only tells us whether we have had been infected. It is a lag indicator of infection.
And depending on which type of antibody, it tells of the different phases of recovery or infection fighting.
And some antibodies may appear a week after infection, while others appear later.
Or it may also take longer than 2 weeks to mount a response with enough antibodies to be detected.
This can vary from patient to patient.
This is like fever - old folks may mount only a very mild fever to an infection, when a younger person may mount a fever more strongly and clearly.
So antibody test kits may be marketed as antibody test kits, with info on accuracy, sensitivity and specificity. They should not be marketed as rapid covid-19 test kits.
Speed with low accuracy or poor specificity is worse than useless.
What is specificity?
It means the test picks up the antibody to covid-19 specifically, and not the antibody to other human common cold coronaviruses, to dengue, or to other viruses or bacteria.
Otherwise, we may mistake a dengue antibody for a covid antibody for instance. Am exaggerating to make a point, of course, bcos no serious test kit company worth their salt will make such a basic mistake.
What is sensitivity?
This is the ability of the test to pick up low amounts of antibodies or viruses.
For instance, the typical swab and PCR method can take a short or a long time to do - a short time means we multiply the virus bits a few cycles in a RT-PCR and thus have X amount of virus bits that we may not detect, and so this may be useless as a mainstream test kit a long time means we go through many more cycles to generate many more bits of the virus, and thus we can pick up the virus easier, but if we do this for too long, we lower our throughput capacity.
So a test may pick up say 100 viral bits vs another which needs 1000 viral bits, while a 3rd needs just 20 viral bits.
And each will require different time to do so, measured in hours under the RT-PCR approach.
So this is a case of speed vs sensitivity.
This kind of trade off often happens for biological type testing.
There are alternative technologies which may be faster, but none are available in commercial quantiites yet - they are still being developed, or are being validated.
Finally, the accuracy.
This means when we have a reading of Y, we know that the real number could range from Y-Z to Y+Z.
To complicate matters, sometimes we have Y-Z1 to Y+Z2. Hee! But let&rsquo s keep to a single Z for simplicity.
If Z is a small percentage of Y, we know we can rely on the Y to make a decision.
But if Z is bigger than Y, then we pretty much can ignore Y of a certain value.
Take the ATP machine - we use this as a first line check of the amount of living microbial organisms say on a door knob.
Suppose the accuracy Z is 250, and the machine gives a Y reading of 22. That doesn&rsquo t mean that we are really at 22. It means the true number can be anywhere from 0 to 250.
So we should then use the 250 mark as the pass/fail, rather than try to aim to be 0 or 50, etc.
The machine just doesn&rsquo t give us that kind of accuracy to make these low numbers meaningful.
So media reports on all test kits should ask for their test data and share those test data as a way to educate our people fully, and not get carried away by the focus on speed as if that is the be all and end all of test kits. Or ask for their user base.
P.s.
I don&rsquo t have the info on the Biolidics off the top of my head, and have no specific information on their test kit performance.
But it would be good if Biolidics or any other test kit producers share these information with the media.
It is also useful for mainstream media to go get medical or research specialists to help them interpret test kit specs, or go get a tutorial quickly.
Under today&rsquo s emergency situation, many health authorities may give provisional status without requiring the full jing-bang of validation and trials that they would normally require. So waving the names of this or that authority is not the way to go.
And my apologies to both Biolidics and Straits Times for using their story to hang this PSA peg to alert folks on how we should look at news on this or that superduper 2 minute or 10 minute test kit.
Thank you, all, for this opportunity to share some thots and observations.
P.p.s.
A recent NYT article just reported that of the 14 antibody tests, only 3 gave consistently reliable results.
The rest didn&rsquo t perform as advertised.
Layman translation - the rest were junk.
Even the best 3 had flaws.
Only one didn&rsquo t have false positives.
Why does false positives happen?
One reason has to do with specificity as discussed earlier.
If a test cannot be very very specific to covid-19, and recognises something else as covid-19 antibody, we will end up as a false positive. That is a very clear no-no.
Others may have very high false positives - which means they are junk tests.
More on other points in the NYT article later."
newbieliu ( Date: 27-Apr-2020 09:12) Posted:
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Actually what she says is very true. This test kit is just an ordinary test kit among the millions out there which test for anti body instead of Covid19 virus. But it is marketed as a Covid19 test kit. Really spit saliva at this type of company. At times like this where money is important for so many, they still dare to come out with misleading statement about their product. All the more I can confirmed they will lose money in this venture when news get out to the markets in US and EU. I think as per her capacity, she knows it?s difficult to get accurate Covid19 test kit, and when she?s heard of one from biolidics, she?s bound to open her eyes and ears big. And to Biolidics management, you guys have no moral compass. You should rename your product as antibody test kit and not misrepresent it as Covid19 test kit. There are so many of this test kit around so very anti body test kit is now known as Covid19 test kit? What a joke. I think your share price deserve no more than $0.10. Really unscrupulous company. Those who hope the share price will appreciate till $0.70 or $.80 can slowly wait.
brchkho1 ( Date: 27-Apr-2020 09:38) Posted:
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A number of medical storks and and healthcare stocks are positive now FYI
albeniz ( Date: 27-Apr-2020 09:38) Posted:
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Staying by the side, to watch how this epiode unfolds.