China Approves Merck's Chicken Bronchitis Vaccine

• The live vaccine can be administered to chicks as young as 1 day old and targets the highly contagious 4-91 coronavirus strain first identified in Britain in the early 1990s
• Chicken bronchitis causes reduced egg production and coughing, with experts warning of 'severe and complex' epidemic risks due to the disease's high mutation rate and rapid transmission
• China's vast chicken population of over 5 billion birds represents a substantial commercial opportunity for Merck's newly approved veterinary vaccine

Summary

Key Development:

Merck announced that China's agriculture ministry has approved its live vaccine for infectious bronchitis in chickens, effective Thursday, May 27. The approval grants access to the world's largest poultry market, with China home to over 5 billion chickens.

Product Details:

• The vaccine targets infectious bronchitis strain 4-91, a highly contagious chicken coronavirus first identified in Britain in the early 1990s
• Approved for use in chickens aged 1 day and older
• Live vaccine formulation available immediately for newly hatched chicks

Disease Background:

According to the US National Institutes of Health, chicken bronchitis causes reduced egg production and coughing in infected birds. Professor Zhang Guozhong from China Agricultural University emphasized the disease's "high mutation rate and rapid transmission," warning of "severe and complex" epidemic risks across flocks.

Market Implications:

This approval represents a significant commercial opportunity for Merck's animal health division in the world's largest poultry-rearing nation. The vaccine addresses a critical need in China's massive poultry industry, where infectious bronchitis poses substantial economic risks through reduced productivity and potential flock losses.

The timing is particularly relevant as China seeks to protect its poultry supply chain and maintain egg production levels. Access to this market could generate substantial revenue for Merck while helping Chinese poultry producers mitigate disease-related losses and improve operational efficiency.