The year 2020 was characterised by a worldwide pandemic crisis due to dissemination of a Coronavirus, the SARS-CoV-2 also named COVID-19. Many economic and social domains were impacted by adaptions or restrictions by the objective to limit local dispersion and more global flow of the virus. Without describing all human health effects of this virus, one characteristic is temporary anosmia. In this paper, firstly the physiological impact is synthetized to explain the anosmia. Secondly, because olfactometry need human smell, adaptations of sensorial methods are described. These adapted methods were proposed by laboratories/companies in charge of olfactometry or odour measurement and mainly concern how the distance guarantees between panellists were proposed.