zuhura yunus, bbc news, dar es salaam.agined 12 months later covid vaccines would not only have been developed but also rolled out so fast in the uk, the us and elsewhere. science was always going to be the way out of this pandemic. our medical editor fergus walsh looks back at the role science has played throughout. and a warning, his report contains some flash photography. within days of the first reports of a new virus emerging in china, vaccine scientists around the world sprang into action. in oxford, their covid vaccine was designed over a single weekend, two months before a pandemic was declared. so, we took that information, that tiny bit of the sequence from the coronavirus, and used that to put into our platform vaccine technology. this was only possible as they'd spent years researching the processes needed. in april, vaccine trials got underway in oxford. other groups around the world were following suit. developing vaccines can take five years or more. government and industry funding helped cut out delays, and

the bbc�*s zuhura yunus reports from dar es saalam.sident. she was sworn in in a brief ceremony at state house in the country's commercial capital dar es salaam. in front of dignitaries and lawmakers. translation: |, samia suluhu| hassan, do solemnly swear that i will do all my presidential duties for the united republic of tanzania faithfully. i will invest all my effort into fulfilling the duties of this office with all my heart. i will be fair to everyone according to the laws and traditions of the united republic of tanzania without fear, favour or discrimination. so help me god. the 61—year—old, who is the first female president of the east african country, takes over following the death ofjohn pombe magufuli, who died on wednesday. officials say he died of heart complications, but there has been widespread speculation that he contracted covid—i9. walking down the streets in dar es salaam, you would not know today a president was sworn in. let alone what a historic moment it was for this country. its first female leader. many tanz

zuhura yunus, bbc news, dar es salaam.rld happiness report which ranks the happiness of 149 countries. finland tops the list for the fourth year in a row, with the report also revealing the impact of covid—i9 on people around the planet. 0ur news reporter, gareth barlowjoins us for more on this. for lender the top. who are the others? in for lender the top. who are the others? , , ., ., others? in its ninth year now, a big representation - others? in its ninth year now, a big representation from - others? in its ninth year now, a big representation from the | a big representation from the european and scandinavian countries at the top there. we have got fenland in first place as you say after four years there. and denmark in second place, switzerland' iceland and the netherlands rounding out the netherlands rounding out the top five. actually, the top 10 is completely european countries apart from new zealand who have snuck in at number nine. at the other end of the scale, in an and the bottom of the list, afghanistan. the

zuhura yunus has more in dar es salaam.red. nobody knew where he was, stirring rumours about his health within the country of tanzania and outside tanzania. he is the first president to die in power. and less than five months ago, he was elected to be the president of tanzania, which was his last term and the second term. there have been very mixed feelings aboutjohn pombe magufuli. it is not stated yet when he's going to be buried, but it has officially been announced that the country will mourn for 21 days forjohn pombe magufuli. european medical regulators have given the astrazeneca vaccine the all—clear. they've said, in the clearest possible terms, that the jab is safe and effective for use. that comes after a number of european countries have suspended the administration of the vaccine, amid worries that it could lead to blood clots. 0ur medical editor fergus walsh has more. every injection, every vaccine given is another person protected. half a million people a day are getting immunised at present. in hull, there wa