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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 new ALLFLEX® CleanVax™ nozzles and shields for clean, fast and convenient administration of intranasal vaccines to cattle.

The CleanVax intranasal vaccination system includes shorter nozzles that are less invasive than conventional cannulas, as well as clear plastic disposable shields that can be replaced between animals or groups of animals for more hygienic administration.

“CleanVax nozzles and shields optimize every aspect of the intranasal vaccination process for confidence in a clean, consistent dose every time,” said Jonathon Townsend, D.V.M., Ph.D., dairy technical services for Merck Animal Health. “The system is simple to use and enhances calf comfort, hygiene and consistency, making it easier on both the calf and caregiver.”

The following are the advantages of the CleanVax intranasal vaccination system:

  • Calf-friendly, shorter nozzles minimize discomfort;
  • Atomizer tips ensure even distribution across mucosal surfaces and reduce product drip;
  • Easy-to-use nozzles attach to any brand of syringe or Luer lock applicator gun;
  • Hygienic shields add a layer of protection and enhance biosecurity.

“CleanVax nozzles and shields are designed to make intranasal vaccine administration more hygienic, calf-friendly and consistent,” Dr. Townsend added. “As a leader in intranasal vaccination technologies, Merck Animal Health continues to advance cattle health and production with innovative and effective solutions for cattle producers.”


ALLFLEX CleanVax products are now available through your Merck Animal Health representative or ALLFLEX supplier. Learn more at

ALLFLEX CleanVax™ nozzles and shields from Merck Animal Health enhance calf comfort and hygiene for clean, fast and convenient intranasal vaccine administration.

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, X (formerly Twitter) and Instagram.