News Archives: 2021



CTK’s OnSite Covid-19 Ag Rapid Tests detect newly identified U.K., South Africa, and Brazil SARS-CoV-2 variants

In December 2020, CTK shared that we had no reason to believe that the U.K. variant would affect the OnSite COVID-19 Ag Rapid Test’s performance, and we would work on confirmation studies.  Since then, multiple SARS-CoV-2 variants have been circulating globally, which led us to include them in our confirmation studies. The OnSite COVID-19 Ag Rapid Test detects the presence.... Read Full Article >



Ongoing studies indicate that CTK’s OnSite Covid-19 IgG/IgM Rapid Tests detect antibodies in response to COVID-19 vaccines

CTK’s OnSite COVID-19 IgG/IgM Rapid Test’s performance in detecting antibody responses following COVID-19 vaccination was evaluated in a cohort of 20 subjects that had no detectable levels of anti-SARS-CoV-2 antibodies before vaccination. All 20 subjects (100%) had their first positive result on the OnSite COVID-19 IgG/IgM Rapid Test 9 to 16 days post-vaccination, showing this test’s high sensitivity. Our ongoing.... Read Full Article >