They also clearly show qualitative differences between infection-elicited and vaccine-elicited antibodies: vaccination remains more effective against BA.2 than against the other Omicron sublineages, while convalescent sera were unable to cross-neutralize BA.1 but similarly neutralized Omicron BA.2, BA.4 and BA.5 (compare Figure 1A and Figure 2A). Here, CFB is linked to infection.