They then compared concentrations of these neutralizing antibodies among all variants. Among them, 79% had a quantifiable neutralizing antibody response against the original strain, but this fell to 50% for B.1.1.7, 32% for B.1.617.2, and 25% for B.1.351. Among all variants, fewer antibodies were generated the older the individual receiving the vaccine. More work is underway to test neutralizing antibodies against these same variants in people who have been vaccinated with the Oxford/AstraZeneca vaccine. Lower neutralizing antibody levels may still be associated with protection against covid, the research said.

Source: Mint June 04, 2021 12:16 UTC