( ( ( Delivered directly ) ( to ( ( the ( respiratory tract ) ) ( where ( ( the virus ) replicates ) ) ) ) ) ( , ( Relenza ( ( ( ( ( inhibits ( ( the action ) ( of neuraminidase ) ) ) and ) helps ) ( ( prevent ( the virus ) ) ( from ( ( ( spreading and ) infecting ) ( other ( healthy cells ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (VP (VBN Delivered) (ADVP (RB directly)) (PP (TO to) (NP (NP (DT the) (JJ respiratory) (NN tract)) (SBAR (WHADVP (WRB where)) (S (NP (DT the) (NN virus)) (VP (VBZ replicates)))))))) (, ,) (NP (NNP Relenza)) (VP (VP (VBZ inhibits) (NP (NP (DT the) (NN action)) (PP (IN of) (NP (NN neuraminidase))))) (CC and) (VP (VBZ helps)) (VP (VB prevent) (NP (DT the) (NN virus)) (PP (IN from) (S (VP (VBG spreading) (CC and) (VBG infecting) (NP (JJ other) (JJ healthy) (NNS cells))))))) (. .)))
Delivered directly to the respiratory tract where the virus replicates, Relenza inhibits the action of neuraminidase and helps prevent the virus from spreading and infecting other healthy cells.
(ROOT (S (NP (NNP Tamiflu)) (VP (VBZ inhibits) (NP (NP (NN spread)) (PP (IN of) (NP (NN virus))))) (. .)))