I'm curious, is this headline (which differs significantly from the one on the paper itself) making the common mistake of conflating "immunity" with "antibodies

I'm curious, is this headline (which differs significantly from the one on the paper itself) making the common mistake of conflating "immunity" with "antibodies"? Just wondering if there is a difference between showing that the new strain is resistant to the antibodies as opposed to showing that it is likely to reinfect people who recovered from a previous strain.