( ( ( ( Oral ( cavity ( swab specimens ) ) ) and ) saliva ) ( ( were ( obtained ( for ( virus isolation ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Oral) (JJ cavity) (NN swab) (NNS specimens)) (CC and) (NP (NN saliva))) (VP (VBD were) (VP (VBN obtained) (PP (IN for) (NP (NN virus) (NN isolation))))) (. .)))
Oral cavity swab specimens and saliva were obtained for virus isolation.
(ROOT (S (NP (NNP Saliva) (NNP secretion)) (VP (VBZ initiates) (NP (NN chemical) (NN digestion)) (PP (IN while) (S (ADVP (RB also)) (VP (VBG protecting) (NP (DT the) (JJ oral) (NN cavity)))))) (. .)))