Full text not available. This article's full text was not recovered in the archive. The citation and links above point to the published record. Related research Interferon Production by Double-stranded RNA: A Comparison of Induction by Reovirus to that by a Synthetic Double-stranded Polynucleotide Journal of General Virology · 1971 The Formation and Nature of Foci Induced by a Modified Sarcoma Virus in Human Cells Journal of General Virology · 1971 ← Previous article in this issueThe Formation and Nature of Foci Induced by a Modified Sarcoma Virus in Human Cells