British researchers set out to find whether mixing vaccines is an effective way to protect individuals against COVID-19, but they found that taking one dose of Pfizer and then a second dose of Moderna nine weeks later actually produced a better immune system response than just the two doses of Pfizer.
The study, which was conducted by researchers at Oxford University, examined the immune system responses of 1,070 subjects who took some combination of the AstraZeneca, Pfizer, Novavax, and Moderna vaccines.
Individuals who took AstraZeneca followed by Moderna or Novavax also produced higher antibodies and T-cell responses than those who took two doses of AstraZeneca.
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