Herd immunity just means that the R factors drops to one without any mitigating measures. Right now, Sweden has an R around one, without any enforced mitigatio

Herd immunity just means that the R factors drops to one without any mitigating measures. Right now, Sweden has an R around one, without any enforced mitigation. Of course people's behavior still makes a difference. That, to me, indicates widespread immunity, even if there is no herd immunity by definition.