( ( Many inhibitors ) ( ( act ( by ( ( preventing virus ) ( from ( attaching ( to ( ( ( ( ( cells , ) ( others ( by ( ( directly inactivating ) virus ) ) ) ) , ) and ) ( a ( ( few ( by ( inhibiting virus ) ) ) replication ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Many) (NNS inhibitors)) (VP (VBP act) (PP (IN by) (S (VP (VBG preventing) (NP (NN virus)) (PP (IN from) (S (VP (VBG attaching) (PP (TO to) (NP (NP (NNS cells)) (, ,) (NP (NP (NNS others)) (PP (IN by) (NP (ADJP (RB directly) (JJ inactivating)) (NN virus)))) (, ,) (CC and) (NP (DT a) (ADJP (JJ few) (PP (IN by) (S (VP (VBG inhibiting) (NP (NN virus)))))) (NN replication))))))))))) (. .)))
Many inhibitors act by preventing virus from attaching to cells, others by directly inactivating virus, and a few by inhibiting virus replication.
(ROOT (S (NP (NNP Tamiflu)) (VP (VBZ inhibits) (NP (NP (NN spread)) (PP (IN of) (NP (NN virus))))) (. .)))