As the US struggles to suppress the rapidly advancing coronavirus Delta variant, new evidence has emerged that the latest Lambda mutation — ravaging parts of South America — won’t be slowed by vaccines. In a July 28 report appearing on bioRxiv, where the study awaits peer review prior to getting published, researchers in Japan are sounding the alarm on the C.37 variant, dubbed Lambda. And it’s proven just as virulent as Delta thanks to a similar mutation making them even more contagious. The strain has been contained in 26 countries, including substantial outbreaks in Chile, Peru, Argentina and Ecuador. “Notably,...