Arcturus Reports Three-Month Durability Results From ARCT-154 COVID-19 Booster Trial

  • Arcturus Therapeutics Holdings Inc ARCT provided updated data from its Phase 1/2 booster clinical trial showing the durability of antibody response with ARCT-154 for at least three months after a low-dose (5 mcg) booster.
  • The study also exhibited that booster vaccination generated strong immune responses, both with respect to response magnitude and duration of response for at least three months post-boost. 
  • Twelve participants in this arm received 5 mcg of ARCT-154 at least five months after receiving two primary doses of Pfizer Inc PFEBioNTech SE's BNTX Comirnaty. 
  • Related: Arcturus' COVID-19 Vaccine Candidate Meets Primary Goal In Vietnam Study.
  • Results show that a single 5 mcg dose of ARCT-154 led to neutralizing antibody responses that remained 30-fold elevated over baseline (pre-boost) levels at three months after vaccination. 
  • 28-fold and 40-fold increases in neutralizing antibody responses from baseline levels were seen on Day 15 and Day 29.
  • Data for Beta strain also demonstrated notable durability of neutralizing antibody response with 24-fold at three months after booster vaccination, compared to 26-fold and 31-fold over baseline on Day 15 and Day 29, respectively.
  • Price Action: ARCT shares are down 9.61% at $20.42 during the market session on the last check Thursday.

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