Rise & fall of SonaThis was all the rage last summer.. Now... Plummeted... https://themarketherald.ca/sona-nanotech-withdraws-rapid-covid-19-antigen-test-application-based-on-feedback-from-health-canada-2020-11-25/?utm_source=threadview%20tmh%20widget&utm_medium=widget&utm_campaign=threadview%20tmh%20widget%20%7C%20click