A homologous NADC34-like PRRSV-2 inactivated vaccine partially modulates pulmonary viral load and pathological lesions under controlled challenge conditions
Background Porcine reproductive and respiratory syndrome virus (PRRSV) continues to cause substantial economic losses in the global swine industry, largely due to its rapid genetic evolution and capacity for immune evasion. Lineage 1 NADC34-like variants have become increasingly prevalent in East Asia, raising concerns...