SARS-Associated Coronavirus Quasispecies in Individual Patients

Abstract excerpt

To the Editor: Quasispecies are known in RNA viruses such as hepatitis C virus and human immunodeficiency virus.1 Owing to poor fidelity of RNA polymerases, RNA-virus populations typically contain genetic variants that form a heterogeneous virus pool. The severe acute respiratory syndrome (SARS)–associated coronavirus, as a newly identified RNA virus,2 however, has been reported with relatively limited...

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