In updated guidance on COVID-19 testing strategies, the World Health Organization (WHO) says it does not currently recommend widespread screening of people without symptoms, citing the cost of such a strategy and its ineffectiveness.
However, “countries with the resources and desire to expand testing to the general public (regardless of symptoms) should demonstrate that they have the necessary public health infrastructure in place to respond to positive results and that resources are not being taken away from the testing of suspected cases, which is the top priority,” the WHO told The Epoch Times via email.
Testing should be directed “to where they are expected to have the biggest public health impact,” the WHO said, adding, “this means that all those who are suspected [as defined by the WHO] to have COVID-19 based on symptoms should be prioritized for testing,” irrespective of their vaccination status or disease history.
But in areas with ongoing community transmission, anyone who has come in contact with a probable or confirmed case should still quarantine for 14 days regardless if they are asymptomatic and have not been confirmed positive.
The Centers for Disease Control and Prevention (CDC) says in its most updated guidance that people who are asymptomatic and not vaccinated should be quarantined and tested if they were in close contact with a COVID-19 positive individual.
The CDC says testing is still recommended for “fully vaccinated residents and employees of correctional and detention facilities and homeless shelters.”
People are considered fully vaccinated two weeks after their second dose of a messenger RNA vaccine or a single-dose Johnson & Johnson vaccine.
The WHO’s current guidance on prioritizing tests for people with symptoms is consistent with what the guidance had been prior to the pandemic in treating and diagnosing respiratory viral outbreaks—including the 2003 Severe Acute Respiratory Syndrome (SARS) outbreak and the 2012 Middle East Respiratory Syndrome (MERS) outbreak—which was to predominantly focus on symptomatic cases to stop the transmission of the disease.
COVID Cases May Be Confirmed with Antigen Test
Throughout the pandemic last year, the standard for diagnosing a CCP (Chinese Communist Party) virus infection was through a PCR (polymerase chain reaction) test with cycle threshold values of 40 cycles or higher. This raised concerns that there may be an overreliance on and a misuse of the test as a diagnostic tool since it can’t differentiate between a live infectious virus and an inactivated virus fragment that isn’t infectious.Individuals who had a positive PCR test with or without symptoms of COVID-19 were considered a case and added to the daily COVID-19 case count.
The CCP virus causes the disease COVID-19.
Now, verification of a COVID-19 case can be done through an antigen test, instead of through a nucleic acid amplification test (NAAT) such as the widely used PCR test.
- In symptomatic people in high prevalence settings, it is not necessary to confirm positive antigen test results by NAAT, while a negative antigen test result “may be confirmed by NAAT at clinical discretion.”
- In low prevalence settings, confirmation of negative antigen test results by NAAT is not necessary, whereas a positive antigen test result is up to the clinic to confirm it with NAAT.
- In asymptomatic people “that are contacts of confirmed cases or are frequently exposed, such as health care and long-term care facility workers,” an antigen test result is not necessary to be confirmed by NAAT.