from kim bell in dull how with the headlines on al-jazeera european and u.k. regulators have concluded there is a plausible link between the oxford astra zeneca covered 19 vaccine and rare blood clots but they insist the risk of the corona virus is fog race and then the risk posed by tossing.

from kim bell in doha with the headlines on al-jazeera european and u.k. regulators have concluded there is a plausible link between the oxford astra zeneca covert 19 vaccine and rare blood clots but they insist the risk of the corona virus is fog race at then the risk posed by tossing the number of corona virus deaths in brazil has dipped slightly from the record high of 4200 announced on tuesday another 3800 deaths were reported on wednesday with around 92000 new infections president jiah balsa noddle continues to play down covert 19 and has rejected the idea of a national lockdown and experts in the use of force has testified at the trial of the former police officer who's accused of killing george floyd. said derrick show of unused inappropriate deadly force when kneeling on floyd's nick for more than 9 minutes. the u.s. has agreed to withdraw all remaining combat forces which were deployed to fight against i saw the talks with iraq's government did not settle our timeline some soldiers and coalition forces will stay to train and advise the iraqi army.

kim. >> absolutely. thank you so much, melissa bell in paris. >>> president joe biden says he has a plan to upgrade roadss and even the internet across the u.s. so what will that cost? well, we will take a look at that next. stay with us. >>> from rebuilding america's roads could creating millions of american jobs president joe biden has unveiled what he calls a once in a generation investment, a $2 trillion proposal focusing on infrastructure. cnn's jeff zeleny has the details of the plan. >> it's big, yes. it's bold, yes. and we can get it done. >> reporter: president joe biden unveiling his highly anticipated infrastructure plan, a $2 trillion proposal that goes far beyond rebuilding the nation's crumbling roads and bridges. >> it's not a plan that tinkers around the edges, it's a once in a generation investment in america. unlike anything we've seen or done since we built the interstate highway system and the space race decades ago. >> reporter: in pittsburgh, a city that's become a symbol of innovation in his native pennsylvania, biden pledging to reshape the american economy, create millions of job

kim. >> we will be following that for sure. thooings so much, melissa bellparis. >>> british researchers say they've moved into phase two in a pioneering trial looking into mixing and matching vaccine doses. they are also expanding the trial to include four coronavirus shots instead of just two. cnn's cyril vanier is standing by in london. testing the ability to mix and match, take us through the process and especially why this might be so important. >> reporter: this is a world first. it's a major scientific trial that's under way here in the uk, kim, to test whether you can combine vaccines in a two-dose regimen. for instance, get a first dose of astrazeneca and a second dose of pfizer. those combinations are actually going to increase because moderna and novavax are now part of the trial. imagine the combinations you can have with four vaccines in there. the point of this is that, number one, there are encouraging early signs, even though we don't have definitive results, that combining vaccines could actually improve the overall immune response in vaccin