Views: 0 Author: Site Editor Publish Time: 2022-12-02 Origin: Site
The rise of the highly transmissible delta variant across has increased demand for rapid antigen COVID-19 tests that can be purchased from a pharmacy without a prescription,used at home,school or work,and administered in 15 minutes results within.On September 9,2021,several initiatives to improve rapid antigen testing:It will use the Defense Production Act to increase production of tests,require retailers to sell rapid tests at cost,distribute rapid tests to communities for free centers and food banks,and expand free testing at pharmacies.Testing for COVID-19 has been made easier by rapid antigen tests,which help detect infectious cases before they spread.But many people remain unsure how best to use the tests and whether they are accurate enough to be useful.There are several approved rapid tests on the market.These can be used to test adults and children 2 years and older,whether they have symptoms or not.In terms of speed and convenience,rapid antigen tests have significant advantages over laboratory-based PCR tests.Getting results in 15 minutes instead of waiting a day or more for PCR test results means that COVID-19 cases can be identified immediately and precautions can be taken to prevent transmission. Over-the-counter rapid tests mean more people will be tested because they are easy to perform and much more convenient than PCR tests.As a result,rapid tests can capture more COVID-19 cases overall than relying on PCR tests alone.As a health economist who studies public health policy to combat infectious disease epidemics. know that making COVID-19 testing accessible,accurate and fast is critical to slowing the spread of the virus and helping everyone safely return to normal activities.
Two types of rapid tests are used to detect active COVID-19 infection:rapid antigen tests,which use strips to detect viral proteins,and rapid molecular tests (including PCR),which use medical devices to detect genetic material of the virus.It is important to remember that rapid antigen tests have a different purpose than PCR tests,which are considered the gold standard,although they are not 100% accurate.The rapid test is designed to identify cases with a high enough viral load in the nasal passages to be transmissible not to diagnose all cases of COVID-19. Rapid Antigen Test May Only Detect 85% of PCR-Positive Cases. But the point is that the published studies found that they found more than 93% of cases with a risk of transmission,which is most important for controlling the pandemic.Ellume correctly identified 95% of all positive cases,correctly identified 85%.All three tests correctly identified more than 97% of all negative cases regardless of symptoms.
How should the rapid test be used?
There are three ways that rapid antigen testing can be used to slow the spread.First,rapid testing is available for people with suspected or known exposure to COVID-19. Second,rapid testing can provide an extra precaution before any event with a higher risk of transmission,such as gatherings or travel.Third,testing could also be done on a regular basis such as once a week,if enough tests are available to uncover cases that might otherwise go undetected.It is important to develop a plan based on test results.If you get a positive result,take immediate precautions to slow the spread,such as self-isolating, letting close contacts know of the test result and reporting the case to health authorities.False positives occur in less than 3% of negative cases,but a second rapid test or PCR test the next day can provide further confirmation if needed.If you get a negative result from the rapid test,it means it is unlikely that you are currently contagious.A viral load that is too low to be detected by a rapid antigen test is almost certainly too low to be transmitted.But it's important not to let your guard down completely.These tests cannot detect 100% of infectious cases,so a small number of cases may escape detection,or some cases may become infectious within hours of testing.So it might be a good idea to keep other precautions in place.And,if you have symptoms or a known exposure, it's a good idea to have a follow-up rapid antigen or PCR test in case the first test is false negative.Think of rapid antigen tests as snapshots in time: A negative test doesn’t necessarily mean you don’t have COVID-19.COVID-19 is most transmissible when viral load peaks,estimated within a week of infection.Those who were infected but took a rapid test before or after their viral load peaked would have a negative rapid test result meaning that even if they were infected,they were not currently infectious.One way to reduce the risk of false negatives is to use "serial testing",where a second rapid test is given 24-36 hours later to help catch any infectious cases missed by the first test.
Are the new initiatives enough?
The move to increase access to rapid testing is a key step in curbing the number of cases.But one free test per person is not enough to help people safely return to normal activities.Authorization of additional inexpensive rapid tests will further expand availability and lower prices.In the spring of 2021, free and easy access to a COVID-19 vaccine led to a rapid decline in cases.Making frequent rapid testing available to all,can now do the same.
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