Several coronavirus variants that have emerged in recent weeks have scientists worried. The variants, which were first identified in the UK (B117), SA (B1351) and Brazil (P1 and P2), have several mutations in the spike protein (https://theconversation.com/new-coronavirus-variant-what-is-the-spike-protein-and-why-are-mutations-on-it-important-152463) — the little projections on the surface of the virus that help it latch on to human cells. This protein is the target for all Covid-19 vaccines now being rolled out. So will the vaccines protect us from these new variants?..