Fig. 1

Timeline of key UK service evaluations. Figure is for illustration purposes, where the boxes are reflective of approximate study start date. NT-PCR1 to NT-PCR4: AS versus SS of the nose and throat using PCR. SS-AN-PCR1: SS of the anterior nares using PCR. AS-NT-LFD1: AS of the nose and throat using the Innova LFD. SS-NT-LFD1, SS-NT-LFD2: SS of the nose and throat using the Innova LFD. AS-AN-LFD1: AS of nose and throat and anterior nares using the Orient Gene LFD. SS-AN-LFD1: SS of anterior nares using the Orient Gene LFD. SS-AN-LFD2: SS of anterior nares using the SureScreen LFD. SS-NT-LFD3: SS of the nose and throat using the Innova LFD at participants’ home. SS-MT-LFD1: SS of both nostrils to mid-turbinate level using the Innova LFD. SS-AN-LFD3: SS of anterior nares using the SureScreen LFD at participants’ home. SS-AN-LFD4: SS of anterior nares using the Innova LFD at participants’ home. AS-AN-LFD2: AS of anterior nares using Innova LFD. AN, anterior nares; AS, assisted swabbing; LFD, lateral flow device; MT, mid-turbinate level, NT, nose and throat; NHSTT, National Health Service Test and Trace; PCR, polymerase chain reaction; SS, self-swabbing; VOTC, Voice of the Customer