COVID cases surge again in Europe and Moderna says booster candidate protects against BA.4 and BA.5 omicron subvariants
June 22, 2022 at 10:35 AM EDT
COVID cases are again surging in Europe, driven by the BA.4 and BA.5 subvariants of omicron that are deemed to be 10% to 15% more infectious than earlier variants and are spreading fast in Portugal, France, Germany, Italy, Spain, Greece, the Netherlands and Denmark.