There are a few points that I will explain afterwards, and you won’t comment so badly!
1. Once the human body is infected by a foreign substance, antibodies will be produced at the same time, so the lethal factor and its antibodies are both present in the little boy. If the lethal factor is against vampires, the antibodies can be used to develop the detoxifying serum of the HGV virus in vampires. Violet does not have to die (she is dying), and all vampires can be saved.
2. Unfortunately, the lethal factor carried by the little boy is aimed at healthy humans, not vampires. So Violet in the middle was about to give up the little boy, and finally couldn't bear it (this is the maternal seizure).
3. The little boy was on the verge of death due to the lethal factor developed against humans on his body. After fainting, Violet dropped a tear into his eyes (the movie showed 4 tears, so here is the key to the plot), tears It contains the vampire virus HGV, which is the reverse antidote to the lethal factor in the little boy.
In order to verify his conjecture, Violet rescued the little boy. The level of the vampire's development of anti-toxin serum has also taken a big step from the information obtained from this incident-the lethal factor in the little boy may be an anti-drug.
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