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In 1966, Hamre and Procknow described the isolation of an ether-sensitive, ribonucleic acidcontaining virus from students with respiratory illnesses The virus, 229E, was found to be morphologically similar to another "new" respiratory virus, strain B814, reported by Tyrrell and Bynoe and Almeida and Tyrrell 2, 3; both were shown to possess properties similar to those of viruses of the avian infectious bronchitis and mouse hepatitis groups Subsequently, additional isolates resembling B814 and 229E were recovered from persons with upper-respiratory infections The name "coronavirus" has been proposed for this group of human and animal viruses 9.
Cavallaro et al. (Thu,) studied this question.