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43+ Astrazeneca Vaccine Efficacy South African Background . Astrazeneca said it believes its vaccine could protect against severe disease, according to the a study of the astrazeneca vaccine against the b.1.1.7 variant, first reported in the uk, found that the efficacy was similar to its efficacy against the. South africa has halted the rollout of the oxford/astrazeneca jab in the wake of the trial, the results of which are awaiting publication and peer on the issue of delaying the second dose, he said the oxford vaccine efficacy after a single dose was 75% but this was before the south african variant arose. CNN PH: 17M AstraZeneca vaccines 'ineffective' if South ... from external-preview.redd.it Innovations in vaccine technologies, platforms and designs suggest exciting advances in this field. The south african study increased awareness worldwide of the necessity of developing vaccines th...