Good afternoon and thank you see ......This would be the first talk on health prevention,protection and prevention.Could I stop by asking for a ......how many of you had a flu......at the beginning of winter.I thought so.You young once always think you indistructable.Well as there is no doubt where disease ......are everywhere.On the daily basis, the human body ......by various harmful bacterial......A healthy body has a good defense system against many this germ.But the defense only operate well against micro organism that is already encountered in which case it is set to be ......There were two ways in which humans acquire natural ......Actively,when a person have first suffered and then recovered ......and pasitively when ready made for protection .......into the body. For example,from the......blood ......called two number of child......milk.Now, artificial acquired ......can help the body to defende the disease.So we can use active ......as prevented ......versus.This is one of the person ......against injection or......tiny amount of...... in active germs.Not enough ......cause......But the......body defend system to recognize the response to the threat by forming antibodies.
第43次打卡（12月25日）
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