So, this would indicate that the COVID-19 cases are actually higher. 20% who are tested test a false negative. I would think that most people would have some COVID symptom leading them to get checked.
The tests are far from accurate then, so why on earth should we trust any vaccine??
Tests may miss more than 1 in 5 COVID-19 casesAll data and statistics are based on publicly available data at the time of publication. Some information may be out of date. Visit our coronavirus hub and follow our live updates page for the most recent information on the COVID-19 outbreak.
The majority of tests for the novel coronavirus involve taking a swab from the back of the nose or the throat for genetic analysis.
This analysis uses a laboratory procedure called reverse transcriptase-polymerase chain reaction (RT-PCR), which converts genetic material from the virus (RNA) to DNA before amplifying it. It allows the detection of genetic material specific to the SARS-CoV-2 virus, confirming a diagnosis of the associated disease, COVID-19.
Although serological, or antibody, tests are also available, these typically serve to confirm a past infection in people who have since recovered from COVID-19, rather than to detect an active infection.
There has been much discussion about the accuracy of antibody tests, with manufacturers even withdrawing some such tests due to concerns about their reliability. A new analysis suggests that the accuracy of RT-PCR could also be under question.
Scientists from Johns Hopkins Medicine in Baltimore, Maryland, have shown that as many as 1 in 5 RT-PCR tests for the coronavirus may produce false negatives, incorrectly informing a patient that they do not have a SARS-CoV-2 infection when they actually do................
https://www.medicalnewstoday.com/articles/tests-may-miss-more-than-1-in-5-covid-19-cases