Covid-19 roundup: As­traZeneca's can­di­date could elic­it im­mune re­sponse in old­er pa­tients; The EMA could ap­prove a vac­cine with less than 50% ef­fi­ca­cy — re­port

With per­mis­sion to re­sume its Covid-19 tri­al in the US, As­traZeneca is back in the race for emer­gency ap­proval. And ear­ly re­sults sug­gest the can­di­date …

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