这将直接对H1N1产生免疫保护，免除了2009年接种季节性疫苗（不包括H1N1）所造成的危险。

This will provide direct protection against pH1N1 and thereby obviate any risk that might have been due to the seasonal vaccine in 2009, which did not include pH1N1.

youdao

这将直接对H1N1产生免疫保护，免除了2009年接种季节性疫苗（不包括H1N1）所造成的危险。

This will provide direct protection against pH1N1 and thereby obviate any risk that might have been due to the seasonal vaccine in 2009, which did not include pH1N1.

youdao