Fig. 1From: Advances in nanobiosensors during the COVID-19 pandemic and future perspectives for the post-COVID eraThe distribution of articles focused on detecting SARS-CoV-2 antigens over time. A total of 158 published articles published between January 2020 and December 2022 (36 months) were collected for this review. The numbers above the graph represent the timeline of COVID-19 infection casesBack to article page