Brazil to receive first doses of China's Sinovac COVID-19 vaccine

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Researchers said the findings from large, late-stage studies, or Phase III trials, would be crucial to determine if the immune response generated by CoronaVac was sufficient to protect people from the coronavirus infection.

"This is a very important step, because the big worry with any vaccine is that it doesn't work so well in older people", Richard Horton, The Lancet's editor-in-chief, said in an interview with Bloomberg Television.

That was lower than antibodies from vaccine trials by world leaders Pfizer Inc. and Moderna Inc., which are using a different vaccine technology, and which recorded antibody levels in patients that were about the same as those who had contracted the virus.

When data from this stage is sent to the regulators, scrutinised and approved, the vaccine can be given the green light to be used on people worldwide.

Health Minister Harsh Vardhan is not mincing words when it comes to the allocation and distribution of the COVID-19 vaccine.

AstraZeneca shares were little changed in London trading after rising as much as 1.7 per cent earlier Thursday.

News of the vaccine comes amid a debate in the United Kingdom about whether people will be able to see their families over the Christmas period. Pfizer, working with Germany's BioNTech SE, said Wednesday that its shot was 95 per cent effective in a final analysis of trial data, paving the way for the company to apply for USA regulatory clearance.

Responses were "similar" across all age groups, the researchers said. Moderna's vaccine is expected to be stable at normal fridge temperatures for 30 days but for storage of up to six months, it needs to be kept at minus 20 deg C. From the 560 volunteers, 240 of them were over the age of 70 years.

The study also found that the vaccine was less likely to cause local reactions at the site where the injection was administered and symptoms on the day of vaccination in older adults than in the younger group.

"Inducing robust immune responses in older adults has been a long-standing challenge", Angela Minassian, an investigator at Oxford, wrote in a statement.

Oxford expects final-stage efficacy results in the coming weeks.

They show that older adults aged 56-69 and over 70 had a similar immune response to younger adults aged 18-55.

Sinovac Biotech's CoronaVac vaccine can produce antibody responses in two doses given 14 days apart over 28 days, British medical journal Lancet revealed in a new study.

A team of Anvisa inspectors are now in Beijing completing a two-week quarantine period in a hotel before they can visit a Sinovac lab to certify the vaccine for good manufacturing practices required to register it in Brazil, he said.

"The responsibility of our political leaders is to really build trust with the public", said Horton.

"We're on the cusp of being able to protect those elderly people, who we love, through vaccination", he told Radio 4's Today programme.



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