Simian foamy virus(6) zoonoses(4) retrovirus(4) nonhuman primates(4) DNA(3) Hypothesis(3) available data(3) Retrotransposition(3) reported(3) SARS-CoV-2(3) virus replication(3) elements(3) human cell(3) virus(3) explain(3) persistence(3) integration(3) SARS-CoV-2 infected patients(3) HERV-W(3) unlikely(3) COVID19(3) SARS-CoV-2 RNA(3) Topic(3) LINE(3) viral sequence(3) Patient(3) L1(3) HERV(3) Chimeric RNA(3) retroviral(3)