New data released on Thursday, suggests the one-dose Johnson & Johnson (J&J) jab protects against the new, more contagious Delta variant of Covid-19. In fact, the jab may be better at fending off infections from the new strain than it was at protecting against South Africa’s previous variants. The vaccine performed even better against the Delta variant in these laboratory tests than against the Beta Covid-19 strain that was, until recently, the dominant strain of the virus in South Africa. One of the studies was released as a pre-print but has not yet been peer-reviewed. The other is awaiting publication in a peer-reviewed journal.