claim: there is one , and only one strain of sars-cov-2
evidence_1: link david cotton 14 may 2020, 2:38 am so far we have only identified one strain of sars cov 2.", "there is only one strain of sars-cov-2.", "if studies show that all genotypes have the same phenotypic expression - then we prove that \"there is only one strain of sars-cov-2\".")