As­traZeneca's vac­cine hit its first road­block with In­di­an reg­u­la­tors. Will lin­ger­ing doubts de­rail its plans else­where?

British drug­mak­er As­traZeneca is al­ready run­ning be­hind ear­ly com­peti­tors in the hunt for a Covid-19 vac­cine with in­ter­im da­ta that have re­ceived less-than-stel­lar

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