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Merck Animal Health Announces Availability of SEQUIVITY® IAV-S NA for Swine Influenza

RAHWAY, N.J., Nov. 2, 2023 – Merck Animal Health, known as MSD Animal Health  outside of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J., USA (NYSE:MRK), today announced that SEQUIVITY® IAV-S NA (Swine Influenza Vaccine, N1 and  N2, RNA Particle) vaccine is commercially available as part of its swine product portfolio. The  company received license approval for the vaccine from the U.S. Department of Agriculture  (USDA) in 2022.  

The SEQUIVITY IAV-S NA vaccine is the first commercial vaccine that uses only the  influenza neuraminidase (NA) surface antigen to vaccinate pigs against influenza strains H1N1,  H1N2 and H3N2. The NA RNA particles in the vaccine are produced using the innovative  SEQUIVITY platform technology from Merck Animal Health that previously has been used to  target existing and emerging swine pathogens. 

“Merck Animal Health is excited to bring this important innovation to our customers as it  demonstrates our mission to bring forward solutions to solve swine disease challenges and  improve animal health,” said Channing Sebo-Decker, D.V.M., swine technical services  veterinarian, Merck Animal Health. “The SEQUIVITY IAV-S NA vaccine represents a novel  technological advancement and creates a new tool for influenza control programs.” 

The frozen vaccine is mixed with Microsol Diluvac Forte® adjuvant at point of use. Pigs  can be vaccinated as early as three days of age followed by a booster three weeks later. The duration of the immunity against the H1N1 subtype is at least 12 weeks post-booster dose. The  licensing trials demonstrated that the vaccine was safe and significantly reduced IAV-associated  lung lesions and nasal shedding against five challenge strains from the H1N1, H1N2 and H3N2 subtypes.  

SEQUIVITY IAV-S NA vaccine is available in 50-dose and 250-dose presentations. To  learn more about our portfolio of swine health products and vaccines, visit


About Merck Animal Health 

At Merck, known as MSD outside of the United States and Canada, we are unified  around our purpose: We use the power of leading-edge science to save and improve lives  around the world. For more than a century, we’ve been at the forefront of research, bringing  forward medicines, vaccines and innovative health solutions for the world’s most challenging  diseases. Merck Animal Health, a division of Merck & Co., Inc., Rahway, N.J., USA, is the global  animal health business of Merck. Through its commitment to The Science of Healthier Animals®, Merck Animal Health offers veterinarians, farmers, producers, pet owners and governments one  of the widest ranges of veterinary pharmaceuticals, vaccines and health management solutions  and services as well as an extensive suite of connected technology that includes identification,  traceability and monitoring products. Merck Animal Health is dedicated to preserving and  improving the health, well-being and performance of animals and the people who care for them. It invests extensively in dynamic and comprehensive R&D resources and a modern, global supply chain. Merck Animal Health is present in more than 50 countries, while its products are available in some 150 markets. For more information, visit and connect with us on LinkedIn, Facebook, Twitter and Instagram 

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