禽流感
In poultry, In ovo vaccination improves hatchability and efficient protection against Avian influenza (AI), Newcastle disease (ND) and Coronaviruses (Av-CoV). Seroconversion rates of chickens vaccinated as embryos ranged from 27% to 100% with ND vaccination and 85% to 100% for AI vaccination. The birds are protected before delivery to a commercial operation such as a farm, thus preventing the spread of Avian viruses.