AstraZeneca jab followed by Pfizer gives better antibody boost

The study in South Korea involved 499 medical workers - 100 receiving mixed doses, 200 taking two doses of the Pfizer/BioNTech shot and the remainder getting two AstraZeneca shots.

A mixed vaccination of first AstraZeneca and then a Pfizer Covid-19 shot boosts neutralizing antibody levels by six times compared with two AstraZeneca doses, according to a new study.

The study in South Korea involved 499 medical workers - 100 receiving mixed doses, 200 taking two doses of the Pfizer/BioNTech shot and the remainder getting two AstraZeneca shots.