Kottke.org: “This guide to Covid-19 variants (SARS-CoV-2 viruses that have evolved changes to meaningfully alter their behavior) by Michaeleen Doucleff and Meredith Rizzo at NPR cleverly visualizes how mutations of the virus’s spike proteins help bind it more easily to ACE2 receptors on human cells. The key to the visualization is Meredith Miotke’s illustrations of the viruses using Lego pieces to represent the virus spikes and cell receptors. The usual SARS-CoV-2 has 1×1 Lego pieces that can bind with 1×2 pieces…”