AT1 FY21 - General Discussion + FA, page-815

yes, its patented in USA, EU, AU jurisdictions + also has an internationally registered patent which lends coverage in 151 countries through the Patent Cooperation Treaty. Details below:
_{https://patentscope.wipo.int/search/en/result.jsf?_vid=P22-KL9496-47833}

What's patented is:
"METHOD AND DEVICE FOR DISCRIMINATING BETWEEN VIRAL AND BACTERIAL INFECTIONS

The present invention relates to a point-of-care assay for detecting and differentiating between viral and bacterial infections, which effectively assist in the rapid differentiation of viral and bacterial infections. More particularly, the invention pertains to an immunoassay that rapidly distinguishes between viral and/or bacterial infections, wherein the viral marker is the interferon induced Mx-B protein and the bacterial markers are CRP/PCT/BPI."

In other words, the whole concept, method, detection process, analytical methods and results display delivery around "...interferon induced Mx-B protein and the bacterial markers are CRP/PCT/BPI". Any diagnostics device that uses such a test strip method+design+ end purpose around this protein marker + combined viral/bacterial detection diagnostics approach is covered by the patent.

Below page has more info on the Patent Cooperation Treaty, if needed.
_{https://www.wipo.int/pct/en/}
(WIPO dbase can be used to search for patents, trademarks etc in the international space; sometimes need to go down to the individual country patent dbase to get specific details; some country dbases can only be accessed via a paid info request)

The US geo patent was the oldest I could find. The test concept was first registered in Nov 2010. Its been renewed ever since.
_{http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=0&f=S&l=50&d=PTXT&Query=FebriDx}

FebriDX itself is a trademarked brand name of course. It too is registered from US and EU jurisdictions. If i understand the 'trademark' portion of the treaty properly, registration in two jurisdictions amongst member countries provides international coverage across the 151?....happy to be corrected on this.
https://www3.wipo.int/branddb/en/index.jsp

Btw, AT1 has its own patents on its unique integrated LFIA based devices, locally + internationally, so the FebriDx end product is well covered through by multiple patent layers.