"Genetic mapping" . "Manipulation of the infectious bronchitis coronavirus genome for vaccine development and analysis of the accessory proteins" . "18th-century inventions" . "Poultry diseases" . "Gammacoronaviruses" . "Proteins" . "Genomics" . . "Virology" . "Vaccines" . "Viral respiratory tract infections" . "Proteomics" . "Molecular biology" . "Coronaviridae" . "Animal virology" . "Vaccination" .