TY - GEN AU - BURNET,M AU - LIND,P E TI - Genetics of virulence in influenza viruses SN - 0028-0836 PY - 2003///0501 KW - Humans KW - Orthomyxoviridae KW - Virulence N1 - Publication Type: Journal Article UR - https://doi.org/10.1038/173627a0 ER -