Zoetis today announced that the U.S. Department of Agriculture (USDA), Center for Veterinary Biologics (CVB) has issued the company a conditional license for its Avian Influenza Vaccine, H5N2 Subtype, Killed Virus. The vaccine is labelled for use in chickens. The conditional license was granted on the demonstration of safety, purity, and reasonable expectation of efficacy based on serology data.

Zoetis is committed to supporting poultry producers with scientific solutions for Highly Pathogenic Avian Influenza (HPAI). The decision to vaccinate commercial poultry flocks against HPAI rests solely with national regulatory authorities in partnership with the poultry industry.

According to the USDA’s Animal and Plant Health Inspection Service (APHIS), more than 150 million birds in the U.S. have been affected with HPAI since February 2022, including in backyard and commercial flocks. A conditional license is used to meet an emergency condition, limited market, local situation or other special circumstance and is issued for a finite period of time. Conditional licenses may be renewed at the discretion of the CVB.

“When a new strain of HPAI was identified in the U.S. in early 2022, our scientists immediately began work to update our previous avian influenza vaccine,” said Mahesh Kumar, Ph.D., senior vice president, global biologics research and development at Zoetis. “We first worked on HPAI vaccines in 2001-02 when outbreaks occurred in flocks in Southeast Asia. Our readiness with this most recent vaccine is another example of how we continue to live our purpose to nurture the world and humankind by advancing care for animals, ultimately providing solutions to global animal health challenges.”

Zoetis has a long history of developing vaccines to address avian influenza in multiple countries. In 2016, the company received a conditional license for its H5N1 vaccine and a contract award for the USDA’s National Veterinary Stockpile; this same vaccine was first used by the U.S. Fish & Wildlife Service in 2023 to help protect California condors. Zoetis also holds a USDA license for POULVAC^® FLUFEND™ i AI H5N3 RG which has been available in smaller markets outside the U.S. and was used to help protect endangered birds in New Zealand in 2024.

About Zoetis

As the world’s leading animal health company, Zoetis is driven by a singular purpose: to nurture our world and humankind by advancing care for animals. After innovating ways to predict, prevent, detect, and treat animal illness for more than 70 years, Zoetis continues to stand by those raising and caring for animals worldwide – from veterinarians and pet owners to livestock producers. The company’s leading portfolio and pipeline of medicines, vaccines, diagnostics and technologies make a difference in over 100 countries. A Fortune 500 company, Zoetis generated revenue of $9.3 billion in 2024 with approximately 13,800 employees. For more information, visit www.zoetis.com.

DISCLOSURE NOTICES

Forward-Looking Statements: This press release contains forward-looking statements, which reflect the current views of Zoetis with respect to expectations regarding products, product approvals or licenses, products under development and other future events. These statements are not guarantees of future performance or actions. Forward-looking statements are subject to risks and uncertainties. If one or more of these risks or uncertainties materialize, or if management's underlying assumptions prove to be incorrect, actual results may differ materially from those contemplated by a forward-looking statement. Forward-looking statements speak only as of the date on which they are made. Zoetis expressly disclaims any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise. A further list and description of risks, uncertainties and other matters can be found in our most recent Annual Report on Form 10-K, including in the sections thereof captioned “Forward-Looking Statements and Factors That May Affect Future Results” and “Item 1A. Risk Factors,” in our Quarterly Reports on Form 10-Q and in our Current Reports on Form 8-K. These filings and subsequent filings are available online at www.sec.gov, www.zoetis.com, or on request from Zoetis.

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