South Korea to mix and match COVID-19 vaccine doses for 760,000 people

SEOUL: About 760,000 South Koreans who have received a first dose of AstraZeneca's COVID-19 vaccine will be offered Pfizer-BioNTech's vaccine as a second dose due to shipment delays by global vaccine sharing scheme COVAX, the government said.

Several countries, including Canada and Spain, have already approved such dose-mixing mainly due to concerns about rare and potentially fatal blood clots linked to the AstraZeneca vaccine.A Spanish study found that giving a dose of the Pfizer-BioNTech shot to people who had already received the AstraZeneca vaccine is highly safe and effective, according to preliminary results.

About 835,000 doses of AstraZeneca's vaccine from COVAX were scheduled to arrive by the end of June, which South Korea planned to use mainly as a second dose for about 760,000 healthcare workers who had received a first dose in April. The delayed shipment will arrive in July or later, while the country has used up its AstraZeneca reserves to meet stronger than expected participation in its vaccination campaign.

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