As reported by Daniel Horowitz at Blaze Media, the new CDC guidance for “COVID-19 vaccine breakthrough case investigation” – meaning people who tested positive after getting vaccinated – says PCR tests should be set at 28 CT or lower. The stated reason for the 28 CT maximum is to avoid false positives on people who have been vaccinated, which would discourage acceptance of the vaccines.
This is another example of ‘following the science’ only when it suits a political purpose; to wit, CDC is not recommending the lower threshold for anyone else being tested. False positives must be avoided to encourage vaccinations, but false positives to prevent children from attending school or maintain other government restrictions seem OK with CDC.
Last summer, the New York Times reported that CTs above 34 almost never detect live virus but most often, dead nucleotides that are not contagious. The Sentinel found that many private labs in Kansas used thresholds of 38 and 40, and another one in Lenexa potentially at 45. The state lab at the Kansas Department of Health initially used a 42 CT on its most commonly performed test; on January 7, they reduced it to 35.