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Covid—19 free as well. so it is just a scenario that the tongans want to avoid at all costs right now. that it is very, very difficult balance right now between a desperate need for humanitarian aid and public health concerns. we turn next to the pandemic. the vaccine makers pfizer and biontech say that they've started a clinical trial of a vaccine that is tailored to target the 0micron covid variant. it is part of research into whether the companies need to replace their current covid—19 jab. it is the first human study of variant—specific vaccine by big western drug makers. john moore ...

And then case in point, what happened with the hmas adelaide, the australian navy ship that was carrying aid to tonga. 23 personnel have tested positive for covid—19, and now we've heard from the australian defence minister, peter dutton, who said, "we're currently in conversation with the tongan authorities about what to do next, whether we actually port and deliver the aid, including, crucially, chinook helicopters that could airdrop aid and supplies to further parts of tonga or we just stand off." shaimaa khalil reporting on that story for us. we turn next to the pandemic. the vaccine mak...

And the families that they live in. so the other concern that we have is the effect of the ash, inhaling the ash, the respiratory issues that may come with it and skin issues. so unicef is providing wash kits, water purification tablets and masks and gloves, to protect them immediately while we ship other basic health and nutrition supplies, education supplies, also psychosocial support and technical support. my my colleague shaimaa khalil there with that report. we turn next to the pandemic. the vaccine makers pfizer and biontech say that they've started a clinical trial of a vaccine that's t...

Booster dose given to people fully vaccinated with Pfizer BioNTech jab showed efficacy of 95.6% in large study.

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