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Vaccines and Covid variants: how effective are the jabs and what will it mean for travel?

Experts say Australia should be able to reopen border as long as vaccines prove effective against severe disease – because that’s what kills people

The results from AstraZeneca’s US phase 3 clinical trials for its Covid vaccine were made available this week with the vaccine showing 100% efficacy against severe or critical disease and hospitalisation. It showed 80% efficacy in those aged 65 years and over and, overall, had 79% efficacy at preventing symptomatic Covid-19.

These interim safety and efficacy results were based on 32,449 participants who had between them 141 symptomatic cases of Covid-19, and although questions about some aspects of the study are now being raised in the US, the good results largely mirror those of previous clinical trials.

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Read the original article at The Guardian

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