Tag: COVID-19 variants

  In places with low vaccination rates, Covid-19 has the chance to linger, and variants develop and travel. Without global vaccine equity, this entirely predictable pattern will repeat

A virus evolution expert explains what researchers know and what they don’t

Delta is more contagious and appears to be more deadly. And it’s more likely to land those infected in hospital and intensive care. Here’s what the latest evidence

SARS-Cov-2 has experienced roughly the same amount of evolutionary change during the pandemic as humans have since Homo habilis first walked the Earth about 2.5m years ago.

Covid-19 vaccination produces a more consistent immune response than a past infection. With the delta variant, the difference in protection may be even greater

It is unlikely that we will reach full herd immunity for Covid-19. However, we are likely to reach a practical kind of herd immunity through vaccination

Bat hosts, lab leaks – tracing SARS-CoV-2 to its origins involves more than just tracking down patient zero