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Pre-flight Covid negative test result and quarantine on arrival


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Maybe I'm just slow, or something does not make sense to me. A pre-flight Covid negative test is supposed to mean that you are Covid free...so how come that there are always people that end up being Covid positive while in quarantine? Were they already infected, despite the pre-flight test being negative?

 

Did they get infected on the plane or during quarantine? But aren't people supposed to be negative since they already tested pre-flight?

 

Did they catch it after doing the pre-flight test or on route to the airport? If that is the case, what is the point of having done the pre-flight test, since it's not a guarantee.

 

If at several points in time, there is a chance to be infected, can a person be 100% sure to be Covid free after quarantine?

 

Not saying that I have a better idea or solution, but I see too many holes in this current process. 

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Because the Virus may only show up in a test after 14 days, it usually shows up after 5 days hence the test at this point but some scientists are saying that it might be longer than 14 days for it to show.

 

So the Pre-Flight test is there to weed out anybody who already has the virus (e.g. may have contracted it 3 weeks before but has no visible symptoms so is unaware) &  the quarantining is there for anybody who may have caught it whilst travelling to Thailand. 

 

Edited by Mike Teavee
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Not criticizing the pre-testing and quarantine at all...the thing is with all the screening, there is no guarantee that everyone coming out of quarantine is 100% safe...and one person is enough to start the whole cycle again...a lot of people already walking around with no masks or partial cover only...many places no longer enforce temperature checks and check in/out.

 

Nothing against quarantine, but the pre-flight testing are no guarantee at all. Creates a lot of issues for non-thais that need to return, while thais can return without testing.

 

Reminds me of all the US citizens having to return in a rush and without screening...and them blaming the Chinese/asians for bringing the virus into the US...

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I'd say the answer to your question is a mix of all scenarios mentioned, some caught it after their pre flight test, some were false negative, some corruptly obtained a negative test, some might have got infected in some way during or after the journey from a fellow untested passenger. I think the quarantine seems to have been catching most of it, doesn't seem to be any outbreaks from it, not that we would necessarily know.

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24 minutes ago, Sheryl said:

It is quite common to test negative in the early stages of COVID infection.

Also, unfortunate for some individuals, false positives can occur in those who had Covid-19 but have subsequently recovered.

 

Testing for active infection by viruses, including SARS-CoV-2 is simply an inexact science.

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2 hours ago, BritTim said:

Also, unfortunate for some individuals, false positives can occur in those who had Covid-19 but have subsequently recovered.

 

Testing for active infection by viruses, including SARS-CoV-2 is simply an inexact science.

As long as governments are able to sell to the populace that it is effective, it will continue. 

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6 hours ago, oompie69 said:

As long as governments are able to sell to the populace that it is effective, it will continue. 

In conjunction with other measures, it is helpful. It is just important to recognise the limitations. Too many people seem to believe that it is an infallible guide to those who currently have active infections.

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2 hours ago, jacko45k said:

The pre-flight test can be up to 72 hours old which offers plenty of time to become infected after the test. One also may doubt the validity of some 3rd world   test result documents. 

Correct, once tested there's no isolation, you're free to roam where you want with no control over who you come into contact with.

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3 hours ago, jacko45k said:

....... One also may doubt the validity of some 3rd world   test result documents. 

 

Having gone through the experience I can agree with you it would be very easy to fake any of the documents, by anyone and everyone. You do not have to show an "original document" at any point of the process, just copies.

 

In these covid times all documents are emailed then printed. Easy to change anything on them IMHO.

Edited by Whale
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