The graph shows the changes that occur in the concentration of antibodies in the blood of a baby before birth and during the first few months after birth.
Which description about the changes in immunity during the first few months after birth is correct?
1 )
active artificial immunity decreases, active natural immunity increases
2 )
active natural immunity decreases, active artificial immunity increases
3 )
passive artificial immunity decreases, active natural immunity increases
passive natural immunity decreases, active natural immunity increases
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