Moderna’s mRNA-based combination vaccine against both flu and COVID-19 has gotten the green light in Europe—but it continues to be shelved in the US, where it was developed. This week, the European Commission authorized Moderna to market the vaccine, mRNA-1083 or mCOMBRIAX, making it the world’s first authorized combination shot for the two respiratory viruses. The decision follows a positive review in February from a key European Medicines Agency’s committee, which paved the way for the approval. Moderna CEO Stéphane Bancel welcomed the news. “By combining protection against two significant respiratory viruses in a single dose, our vaccine aims to simplify immunization for adults, particularly those at high risk,” Bancel said in a press release .…