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Regarding the corona vaccine, the quarantine authorities are planning a cross-vaccination in which some of those who received the first AstraZeneca vaccine get a second Pfizer vaccine. Overseas studies have shown that the effect is greater.
Medical reporter Yoo Seung-hyun reports.
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research team at Oxford University in England gave 463 people over 50 years old with AstraZeneca and Pfizer vaccines in 4 different ways.
In the case of two doses of the same type, and after AstraZeneca, Pfizer, Pfizer, and AstraZeneca were vaccinated in that order.
The greatest amount of neutralizing antibodies that block virus penetration occurred when Pfizer vaccine alone was administered twice.
Immune cells that eliminate viruses in the body were most activated when the Pfizer vaccine was administered 4 weeks after the AstraZeneca vaccination.
Antibody production was 9.2 times higher than when AstraZeneca alone was inoculated twice, and immune cell activation was also 3.8 times greater.
However, the researchers have given the clue that the experimental results are small and the safety has not yet been verified.
[Matthew Snape/Professor, University of Oxford: We believe this should be the default option, as we know that AstraZeneca and Pfizer's standard vaccination schedule can prevent disease.]
Studies have also found that the preventive effect of mRNA vaccines such as Pfizer and Moderna may last longer than expected.
A research team at the University of Washington in the United States found that 14 people in the general population were vaccinated with the Pfizer vaccine once, and immune cells were continuously generated for at least four months.
The researchers explained that a second dose of the vaccine may not require a third dose, but more studies suggest that a booster dose is needed to fight the mutated virus.
(Video editing: Park Ji-in, CG: Kim Jong-un, Han Jung-woo)
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