"In an earlier study, a full dose of the Moderna vaccine was found to raise antibody levels 32-fold in people who had been given two initial doses of AstraZeneca.

Antibodies were raised 11-fold in those who had initially received two doses of Pfizer. Overall, it was found to be the booster that most dramatically strengthened the body’s immune defences."

Ďakujem, toto je helpful.