Virological. ‘Recombinant SARS-CoV-2 Genomes Involving Lineage B.1.1.7 in the UK - SARS-CoV-2 Coronavirus / SARS-CoV-2 Molecular Evolution’, 17 March 2021. https://virological.org/t/recombinant-sars-cov-2-genomes-involving-lineage-b-1-1-7-in-the-uk/658.

Eric Feigl-Ding. (2020, December 6). HUMAN➡️MINKS➡️HUMAN transmission on mink farms in NL. 68% of the tested farm workers and/or contacts had evidence of #SARSCoV2 infection. The coronavirus mutated & even evolved within minks before transmitted back to humans—& keeps #COVID19 perpetuating. Https://t.co/5ARZ6Pq5mO https://t.co/fhrQC9ZVDo [Tweet]. @DrEricDing. https://twitter.com/DrEricDing/status/1335419078446551041

A minimum of 20 base pairs in a completely homologous segment is required for significant recombination. There is an exponential increase in the frequency of recombination when the length of homology increases from 20 to 74 bp and an apparently linear increase with longer DNA segments. Mismatches within a homologous segment can dramatically decrease the frequency of recombination.

How scientists know COVID-19 is way deadlier than the flu. (2020, July 2). Science. https://www.nationalgeographic.com/science/2020/07/coronavirus-deadlier-than-many-believed-infection-fatality-rate-cvd/