** Shares of diagnostics firms 20/20 Biolabs AIDX.O rise 20% to $1.49 premarket
** Co says it is preparing plans to offer Ebola and hantavirus testing if public health agencies need support
** Co is leveraging its COVID-19 testing experience to expand into these infectious disease tests
** AIDX cautioned that no test is ready yet and that regulatory approval would still be required before any test could be used clinically
** As of last close, AIDX down ~95% since its Nasdaq debut on February 19
(Reporting by Kamal Choudhury in Bengaluru)
((Kamal.Choudhury@thomsonreuters.com;))