Delta-like SARS-CoV-2 variants with enhanced transmissibility may cause a more severe pandemic

A SARS-CoV-2 variant with traits similar to that of the Delta variant-;enhanced transmissibility and an ability to infect people who had previous infections/vaccination-;will cause a more severe pandemic with more infections and breakthrough infections/reinfections than variants with either trait alone, according to a mathematical model created by researchers at Harvard T.H. Chan School of Public Health.