Not many people in Ireland have heard of Des and Brendan O’Farrell. From Ashbourne in Meath, the brothers moved to the United States and founded two different businesses specialising in diagnostics. Des O’Farrell founded Empirical Bioscience, while Brendan launched DCN Dx. Both companies have been leaders in the fight against Covid-19, and in identifying many other illnesses too. And over the past 12 months, both companies have teamed up with big strategic investors.  Empirical makes the reagents used in millions of tests, while DCN makes the tests themselves. Both provide other services to the diagnostic industry. Now the brothers have…

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