'They've jumped the gun': scientists worry about Russia's Covid-19 vaccine

Rising chorus of concern over Sputnik V vaccine stems from opaque development and lack of mass testing

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In 1977, Scott Halstead, a virologist at the University of Hawaii, was studying dengue fever when he noticed a now well-known but then unexpected feature of the disease.

Animals that had already been exposed to one of the four closely related viruses that cause dengue and produced antibodies to it, far from being protected against other versions, became sicker when infected a second time, and it was the antibodies produced by the first infection that were responsible, allowing the second infection to hitchhike into the body.

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'Like a prison sentence': the couples separated by Covid-19

A campaign has highlighted plight of unmarried couples from different countries parted for months

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Sarah flew home to Germany in April, leaving her boyfriend, Fares, behind in Jordan, unsure when they might see each other again. “She thought it might take a couple of months,” Fares said.

Inside, he was steeling himself for as long as six months apart, although “I didn’t tell her that,” he says.

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Canberra residents stuck at NSW-Victoria border given four days to travel home to ACT

New South Wales relents on decision to prevent Canberrans transiting through the state after six-day standoff

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Canberrans stuck at the Victorian border have been given four days to return home, after New South Wales relented on its decision to prevent them transiting through the state.

The New South Wales health minister Brad Hazzard said a resolution had been reached on Wednesday, and that drivers must take a direct route and only travel between 9am and 3pm.

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'Good day for our country': Democrats hail Kamala Harris as VP pick

Party leaders and progressive groups appear largely united behind Joe Biden’s choice of running mate

Democrats from all corners of the party appeared largely united behind Joe Biden’s selection of the California senator Kamala Harris as his running mate on Tuesday.

The responses came almost immediately after Biden unveiled Harris as his choice for the vice presidential nominee, less than a week before the Democratic national convention, where Biden will be formally nominated as the presidential candidate for his party.

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Belarus protests: more than 6,000 arrested, says interior ministry

Opposition leaders jailed or driven out of country amid crackdown on protests over election results

Authorities in Belarus say they have arrested more than 6,000 people during three nights of violently suppressed demonstrations against vote-rigging in Sunday’s disputed presidential election, as more footage and accounts emerged of police beating and violently detaining protesters.

Opposition leaders have been jailed and driven out of the country in a massive crackdown following the election, which the election commission said was won in a landslide by President Alexander Lukashenko.

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