102 Short vid over 50 years documented proof viruses are the smallest of parasites. (twitter.com) posted 232 days ago by lovecymru 232 days ago by lovecymru +102 / -0 20 comments share 20 comments share save hide report block hide replies
viruses. All viruses are obligate parasites; that is, they lack metabolic machinery of their own to generate energy or to synthesize proteins, so they depend on host cells to carry out these vital functions. -from a medical encyclopedia