( ( ( The ( cell 's ) ) death ) ( then ( ( would ( spread ( those viruses ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (NN cell) (POS 's)) (NN death)) (ADVP (RB then)) (VP (MD would) (VP (VB spread) (NP (DT those) (NNS viruses)))) (. .)))
The cell's death then would spread those viruses.
(ROOT (S (NP (NNP Tamiflu)) (VP (VBZ inhibits) (NP (NP (NN spread)) (PP (IN of) (NP (NN virus))))) (. .)))