A recent study found that Pfizer jab recipients not only had almost five times fewer antibodies to protect against the Delta variant than the original

Covid vaccine: Pfizer jab recipients have fewer antibodies against Delta variant

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2021-06-04 17:30:07

A recent study found that Pfizer jab recipients not only had almost five times fewer antibodies to protect against the Delta variant than the original strain of Covid-19, but also that these antibody levels decreased with time and age.

The study, conducted by the Francis Crick Institute and the National Institute for Health Research, provided greater evidence for the need to shorten intervals between jabs, and to provide booster jabs, in order to keep as many people out of hospital as possible.

The study analysed blood samples from 250 healthy individuals who received the Pfizer vaccine, and tested the ability of their antibodies to neutralise the different Covid variants.

After a first dose, Pfizer jab recipients had 79 per cent antibody protection against the original strain, 50 per cent against the Alpha (Kent) variant, and only 32 per cent against the Delta (India) variant.

Researchers found no significant differences in results based on sex or body mass index, but determined that with time and age, antibody levels decrease against all variants, even amongst those who had received a second dose.