@Nutmeg031992 @VGrubsky @JohnWest_JAWS @pragmatism_of @BallouxFrancois If R is close to 1 already with existing behavior and immunity, an uptick in immunity from increased spread of a more transmissible variant is enough to push it below 1 even with no behavior changes.
Assumes cross immunity of course, but there always seems to be at least some.
@肉豆蔻031992@VGrubsky@JohnWest_JAWS@practism_of@BallouxFrancois如果R在现有行为和免疫力方面已经接近1，那么对一种更易传播的变种的增加传播的免疫力的提高足以将其推到1以下，即使没有行为改变。
当然，假设存在交叉免疫，但似乎总有一些交叉免疫。