Negative antigen RDT and RT-PCR results do not rule out COVID-19 if clinical suspicion is strong - Authors' reply.

Mandeng N Fai KN Bebell LM Boum Y
The Lancet. Infectious diseases 2021 May 28; . doi: 10.1016/S1473-3099(21)00288-7. Epub 2021 05 28