Sorry, 'stage' was misleading. As described in the PLOS ONE article on this subject, they typically undergo symmetrical transcription. So more accurately, dsRNA

Sorry, 'stage' was misleading. As described in the PLOS ONE article on this subject, they typically undergo symmetrical transcription. So more accurately, dsRNA & ssRNA viruses typically go through a dsRNA stage. DNA viruses typically produce dsRNA during transcription.