UPDATE 5-U.S. secures 300 million doses of potential AstraZeneca COVID-19 vaccine <!-- no image --> <div>* AstraZeneca says it has deals for 400 million doses overall<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=JV69LfEjo-4:JttJitbC-3s:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=JV69LfEjo-4:JttJitbC-3s:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=JV69LfEjo-4:JttJitbC-3s:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=JV69LfEjo-4:JttJitbC-3s:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=JV69LfEjo-4:JttJitbC-3s:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/JV69LfEjo-4" height="1" width="1" alt=""></div> Posted by Reuters