Covid: Scientists developing vaccine boosters to tackle variants
An early study suggests the AstraZeneca vaccine may be less effective against the South African variant.
Author Archives: BBC News - Health
Covid: South Africa halts AstraZeneca vaccine rollout over new variant
A study of the vaccine's efficacy against the South Africa variant shows "disappointing" results.
Covid: Oxford jab offers less S Africa variant protection
Developers say they are likely to have a modified version of the jab by autumn to combat the variant.