(S (S (PP (IN Of) (NP (BASENP (DT those)) (VP (VBN infected)))) (COMMA ,) (S (BASENP (DT the) (NNP WHO)) (VP (VBZ says) (SBAR (S (BASENP (DT the) (NN majority)) (VP (VBP are) (ADJP (JJ aged) (NP (NP (QP (PP (IN from) (BASENP (NN 30))) (PP (TO to) (BASENP (NN 50)))) (NNS years)) (ADJP (JJ old)))))))))) (PERIOD .))