On May 5, 2020, news broke about a reportedly more contagious variant of SARS-CoV-2 based on a preprint posted to bioRxiv. On July 2, the journal Cell published a peer-reviewed version of the paper that offers additional experimental and clinical data about the D614G variant suggesting that it may be more infectious, but concludes that we still cannot be certain about whether the variant makes SARS-CoV-2 more transmissible or leads to more severe disease.
