44. Where is the Flowflex COVID-19 Antigen Home Test manufactured? The test is manufactured by ACON’s FDA registered, state-of-the-art manufacturing facility in China. The manufacturing facility is ISO13485: 2016 certified and inspected by the FDA. For over 25 years, ACON has continued to supply billions of IVD tests per year Worldwide. 45. The Flowflex COVID-19 Antigen Home Test is manufactured in China, is it safe to use? Yes, it is safe to use. The test is manufactured by ACON’s FDA registered, state-of-the-art manufacturing facility inChina. The manufacturing facility is ISO13485: 2016 certified and inspected by the FDA. For over 25 years, ACON has continued to supply billions of IVD tests per year Worldwide.