The false positive rate rose from 1.4% to 2.2%-7.6% when a Hcov was present (alpha and betacoronaviruses)
— Darren Dunn (@ImDarrenDunn2) September 21, 2020
This suggests that PCR tests are detecting Hcov infections in the same way serology tests are.
Conducted by the accreditation body of Germany w/ a fair sized n=#Casedemic pic.twitter.com/3TgTZ4eCjJ