Two-dose vaccines: Study suggests those who've had Covid-19 may only need a single jab

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Andriy Onufriyenko
Andriy Onufriyenko
Andriy Onufriyenko

More than 1.5 million people in South Africa are confirmed to have been infected with Covid-19. According to new research, administering a second vaccine jab of the current two-shot regimens – such as the mRNA vaccines by Pfizer-BioNTech and Moderna – to these individuals might be unnecessary.

Although preliminary, and published in the preprint server medRxiv, the results could have significant implications by potentially freeing up limited vaccine doses for more people, especially in low- and middle-income countries like South Africa.

The findings indicate that previously infected people who received one jab generated antibody protection against the disease quickly and at much higher levels when compared with people who were vaccinated, but had not contracted Covid-19.

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