My previous blog post described how Coronavirus strains adapt and benefit from their naturally high error rate when they copy their own RNA as more virus particles are produced in an infected cell. (Click to read that posting here.) If these changes cause a particular strain to spread easier among us humans then these new strains quickly take over the infection race. There is no evil plot, just the random events of statistics and bad luck for us as variants like Omicron spread faster. Delta is still around, but Omicron gets to new unvaccinated persons first, and eventually, more of those requiring admissions to our hospitals will have Omicron and not Delta. That said, both Delta and Omicron are killing people inside our hospital ICUs. Why exactly does Omicron spread faster than Delta?