A clinical trial to mix and match Covid-19 vaccines will begin in Korea to test whether it can prevent Covid-19 more effectively, local health officials said Thursday.
Lee Yoo-kyung, a senior health official responsible for immunization analysis, said studies of the Covid-19 vaccine mix in Spain, UK, Italy, Russia and China and that the results would be available soon.
In Korea, the Korea National Institute of Health (KNIH) will conduct the mix-dose trial, giving a dose of Pfizer to those who received the first dose of the AstraZeneca vaccine, Lee said.
About 400 to 500 people inoculated with the AZ vaccine will receive a dose of the Pfizer vaccine, she added.
âThis study will be used to find ways to increase the safety and effectiveness of the Covid-19 vaccination,â Lee said.
However, military service members 30 years of age or younger receiving the first dose of the AZ vaccine will receive the second dose of the AZ vaccine, not a different vaccine, health officials said.