( ( In ( a ( healthy ( immune system ) ) ) ) ( , ( ( our bodies ) ( normally ( ( produce ( antibodies ( to ( help ( ( ( ( ( fight viruses ) , ) bacteria ) and ) ( other infections ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (PP (IN In) (NP (DT a) (JJ healthy) (JJ immune) (NN system))) (, ,) (NP (PRP$ our) (NNS bodies)) (ADVP (RB normally)) (VP (VBP produce) (S (NP (NNS antibodies)) (VP (TO to) (VP (VB help) (NP (NP (NN fight) (NNS viruses)) (, ,) (NP (NNS bacteria)) (CC and) (NP (JJ other) (NNS infections))))))) (. .)))
In a healthy immune system, our bodies normally produce antibodies to help fight viruses, bacteria and other infections.
(ROOT (S (NP (DT A) (JJ healthy) (JJ immune) (NN system)) (VP (VBZ fights) (PRT (RP off)) (NP (NP (NNS infections)) (CC and) (NP (JJ other) (NNS dieases)))) (. .)))