It's a question that scientists have been trying to answer since the start of the pandemic, one that is central to the rancorous political debates over coronavirus vaccine policies: How much immunity ...

As the world wearies of trying to suppress the SARS-CoV-2 virus, many of us are wondering what the future will look like as we try to learn to live with it. Will it always have the capacity to make us ...

Herd immunity occurs when enough people become immune to a disease, either through vaccination or previous infection. This can reduce the likelihood of it spreading and increase protection for ...