ARCT - Arcturus: Emerging Covid Variants May Provide A Raison D'êTre November, 28 2021 01:59 PM Arcturus Therapeutics Ltd. Arcturus develops mRNA vaccines for covid-19. Other bigger players made the company almost irrelevant. Emerging variants of concern just may give the company a reason to exist. For further details see: Arcturus: Emerging Covid Variants May Provide A Raison D'êTre