Preferably, the antigenicity-reducing component is an extract of an Olea or a Ligustrum plant extracted with water or an organic solvent.
优选地，所述抗原性降低成分是用水或有机溶剂从木犀榄属或女真属植物中提取的提取物。
Preferably, the antigenicity-reducing component is an extract of an Olea or a Ligustrum plant extracted with water or an organic solvent.
优选地，所述抗原性降低成分是用水或有机溶剂从木犀榄属或女真属植物中提取的提取物。
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